The Drift — August 13 – 19, 2026

The Drift, in brief: I promised you two mornings this week. The weather took one of them back. Friday is the one that's left, and it's the biggest tide of the entire summer — minus 1.2 feet at 6:56 in the morning on a 13.0-foot range, in full sun, with a second minus tide at sunset the same day. After Friday the water walks away and doesn't come back until September.

If you only do one thing this week: stand on the Brewster flats or at Skaket in Orleans at 6:56 Friday morning. Sun's up at 5:46, northwest at 5 to 9, not a cloud in the forecast. That's the widest sand of the year at an hour you can actually make.

Gray and close out there this morning, and thunder in the forecast before lunch. Not the Thursday I sold you.

Here's the shape of the week, and it's the exact opposite of last week's. Last week everything built — a staircase of lows that only went down, seven days running. This week hands you its best on day two and then quits. The range at Sesuit goes 11.9, 13.0, 12.5, 11.7, 10.8, 9.9, 9.1. The daily low goes −1.2, −1.2, −1.0, −0.6, −0.1, +0.5, +1.0. By next Wednesday the bay barely bothers to leave.

These are the real NOAA predictions, not whatever your phone rounds them to. The bay owns the front half of this week, so here's the Sesuit Harbor tide page — the station that stands in for the whole Brewster shore. Print it, stick it on the fridge, and circle Friday. Out toward the tip, Wellfleet runs about half an hour behind Sesuit and Provincetown a few minutes either side of it.

The promise, and the half of it I have to take back

Last week I ended the column by telling you to mark two dates: Thursday the 13th, minus 1.2 at 6:08 in the morning, and Friday the 14th, minus 1.2 at 6:56 — both in full sun, I said.

The tides showed up exactly as advertised. Both of them, to the minute, to the tenth of a foot. The sun didn't.

Thursday is a write-off, twice over. By the time this reaches you the 6:08 low has already come and gone, and it came and went under a sky carrying a two-in-five shot at showers and thunderstorms in every one of the eight towns — Brewster and Harwich and Orleans at 42 percent, easing only to the mid-30s out at the tip, with the whole thing clearing to mostly cloudy afterward. That's the wrong order. Storms first, gray second, is precisely the pattern that ruins a six o'clock low. If you got out there dry this morning, you stole something. Most people didn't.

So. I was right about the water and wrong about the sky, and the honest read is that I shouldn't have promised sunshine eight days out. I'll stop doing that.

Friday, though, is everything I said it would be and slightly more. Sunny — flatly sunny, zero to one percent in every town, from Brewster to Provincetown. Northwest at 5 to 9, which is barely a wind at all and is blowing off the land on the ocean side. Dead low at Sesuit is minus 1.2 feet at 6:56 in the morning, with the sun already up at 5:46. And the range that day is 13.0 feet — bigger than Wednesday's 12.9, bigger than anything in last week's issue, the biggest single swing of this entire summer.

Then Friday does something I don't get to write about most years. The evening low is minus 0.7 at 7:14 in the afternoon, and sunset is 7:42. That's twenty-eight minutes of low, gold, sideways light on sand that is out farther than it has been since spring. A minus tide at breakfast and a minus tide at sunset, on the same cloudless day.

If you take one morning off work this summer, take Friday. I've spent the clear your calendar call twice this season and I'm spending it a third time, because this is the last one until the leaves turn. The next tide that opens the bay like this arrives in the second week of September, and by then you'll want a jacket to stand in it.

Day by day

Thursday the 13th is the one we already discussed, and there's not much to add. Showers and thunderstorms rolling through — 40 to 42 percent in Brewster, Harwich and Orleans, 39 in Chatham, Eastham and Wellfleet, 36 in Truro, 32 out at Provincetown — clearing to mostly cloudy behind them. 77 in Brewster, Harwich and Orleans, 76 in Chatham, Eastham and Wellfleet and Provincetown, 75 in Truro. Southwest at 5 to 10. The morning low was −1.2 at 6:08 and it's gone. What isn't gone is the evening low: −0.6 at 6:24, with sunset at 7:44. If the sky settles by five — and the forecast says it does — that's a perfectly good walk on a wet-sand evening with nobody on it. Over on the Atlantic side, Aunt Lydia's Cove runs its biggest range of the week today at 6.8 feet, bottoming at −0.5 at 7:34 this morning. Bars are drying out at the elbow that don't usually dry out.

Friday the 14th. Clear your calendar. Everything above. Minus 1.2 at 6:56 in the morning, minus 0.7 at 7:14 at night, 13.0 feet between the two ends of the day, and full sun over all of it. 79 in Brewster and Harwich, 76 in Orleans, 75 in Chatham, Eastham, Wellfleet, Truro and Provincetown. Northwest at 5 to 9.

Where to stand: Paines Creek 🅿️👶 or Linnell Landing 🅿️ in Brewster, Skaket 🅿️👶 in Orleans, First Encounter 🅿️👶🌊 in Eastham. And this is a bay-wide event, not a Brewster one — Wellfleet bottoms at −0.9 at 7:25 and Provincetown at −1.0 at 7:00, so the flats off Mayo Beach and out toward Herring Cove open just as wide.

Saturday the 15th is the day I'd give to anybody who thinks 6:56 is an unreasonable hour to be anywhere. Sunny again, cooler — 76 in Harwich, 75 in Brewster, 74 in Orleans, 73 in Eastham, Wellfleet and Truro, 72 in Chatham and Provincetown — with a north wind at 3 to 10. The low is −1.0 at 7:42 in the morning. That is two tenths of a foot shallower than Friday in exchange for forty-six more minutes of sleep, which for most households is a trade worth making. Saturday is also the fish day: the ebb west of Morris Island tops out at 1.15 knots at 6:56 in the morning, the strongest water of the week at either end. Then take the afternoon for Pleasant Bay 👶 — high water there is 4:26, the wind's light and northerly, and you'll have depth over every bar without reading a chart.

Sunday the 16th turns the heat back on and starts the slide. 81 in Orleans, 80 in Harwich and Wellfleet, 79 in Brewster, Eastham and Truro, 77 in Provincetown, 76 in Chatham. Mostly sunny most of the day with a slight shower chance arriving late, southwest at 5 to 13. The bay low is −0.6 at 8:27 in the morning — the last minus tide of this run that lands in daylight. Take it if you want it, because Monday's is −0.1 and Tuesday's is over the line entirely. This is the swim day. The Sound is 78°, which is as warm as this water gets in any year of your life — Hardings or Cockle Cove 🌊 in Chatham, Red River or Wychmere 🌊 in Harwich. The ebb at Morris Island still runs 1.12 at 7:43 in the morning, so the rip's worth a rod before the beach fills.

Monday the 17th is the week's wet one and I'd stop arguing with it. 81 in Harwich and Orleans, 80 in Wellfleet, 79 in Brewster and Eastham, 78 in Truro, 77 in Provincetown, 76 in Chatham — warm enough — but every town carries showers and thunderstorms at 46 to 48 percent, on a south wind at 10 to 15 that'll put a chop on the Sound. The bay low is −0.1 at 9:13 in the morning, the first non-minus low in five days, and the run is officially over. Let Monday be the errand day. If the sky holds through mid-morning you've got a soft, wide-ish low at a friendly hour and I won't stop you — but don't build the day on it.

Tuesday the 18th clears, cools, and brings the first easterly in two weeks. Mostly sunny, showers down to single digits, northeast at 5 to 9. 79 in Harwich, 78 in Orleans and Wellfleet, 77 in Brewster and Eastham, 76 in Truro, 75 in Chatham and Provincetown. Lovely day to be outside and a poor day to read a tide chart: the low is +0.5 at 10:00 in the morning and the flats stay under water. That northeast is worth a note on the east-facing outer beaches — see the rip line below — but keep it in proportion. Nine miles an hour of onshore air is a notch, not an alarm.

Wednesday the 19th closes the week warm and flat. Sunny to mostly sunny, southwest at 3 to 10, and the hottest air of the seven days: 82 in Harwich and Orleans, 81 in Wellfleet, 80 in Brewster and Eastham, 79 in Truro, 78 in Provincetown, 77 in Chatham. The water gives you nothing — low +1.0 at 10:48 in the morning, a 9.1-foot range, the smallest of the week, and the softest ebb at Morris Island all week at 0.88 knots. So don't chase it. Wednesday is a swimming and sitting-still day, and with the Sound at 78 and the bay at 74 there is no bad choice. First-quarter moon at 37 percent, so the dark-sky window is closed too.

This week's windows

• Flats walk: Friday, 6:56 AM, −1.2 feet. Brewster (Paines Creek or Linnell 🅿️), Skaket in Orleans, First Encounter in Eastham 🅿️👶🌊. Sun up 5:46, northwest at 5 to 9, no clouds. Sleep-in version: Saturday, 7:42 AM, −1.0. Golden-hour version: Friday, 7:14 PM, −0.7, sunset 7:42.

• Paddle: Saturday afternoon, Pleasant Bay out of Meetinghouse Pond or Quanset 👶 — high water 4:26, north wind at 3 to 10, sun on the water. Tuesday morning is the calm alternate if you'd rather have the place to yourself.

• Swim: Sunday or Wednesday, the Sound at 78° — Hardings, Cockle Cove, Red River, Wychmere 🌊. And for the first time all summer the bayside is a real answer too: 74° at Linnell or First Encounter, warmer still in the shallows on the afternoon flood.

• Fish: the Morris Island ebb, and this is a good week for it early. Saturday 6:56 AM at 1.15 knots is the strongest of the seven days; Friday 6:08 AM runs 1.14, Sunday 7:43 AM runs 1.12, and every single daylight ebb from Thursday through Monday clears a knot. Then it dies — Wednesday's 0.88 is the softest water of the week. The flood never clears 0.69 and never does here.

• Dark sky: Thursday and Friday nights only — the moon is at zero percent and two. After that it fattens fast and the window shuts.

The water, zone by zone

The new moon was Wednesday, so we're on the back side of the spring tides — which means the biggest swing of the run lands right at the start of this week and then unwinds toward neap. Everything below is the same story told four ways.

The bay flats get three genuinely large mornings and then close up shop. Sesuit runs a range of 11.9 → 13.0 → 12.5 → 11.7 → 10.8 → 9.9 → 9.1 across the seven days, with lows of −1.2, −1.2, −1.0, −0.6, −0.1, +0.5, +1.0. Wellfleet and Provincetown follow within half an hour and nearly to the tenth — P'town's −1.0 Friday at 7:00 is its deepest of the month. Thursday through Sunday you can walk out; Monday through Wednesday you can't be bothered.

The Sound does its quick four-and-a-half-foot swing, and the current west of Morris Island runs a long slide: 1.11 knots Thursday, up to 1.15 Saturday, then down through 1.12, 1.06, 0.97 and finally 0.88 by Wednesday. That's the mirror image of last week, which was strong at the ends and lazy in the middle. The flood tops out at 0.69 and mostly sits near 0.55. The ebb is the strong water in this corner of the Cape every week of the year, and the front half of this one is the best run of it we've had in a month.

Pleasant Bay goes negative for three days and then gives it up — −0.3 Thursday and Friday, −0.2 Saturday, −0.1 Sunday, and back over the line for good on Monday. The range shrinks from 4.2 to 3.0 across the week. It still runs about three hours behind the Sound on the lows; learn that lag once and you never look it up again. If you wanted to walk somewhere in Pleasant Bay you've only ever paddled, Thursday through Saturday morning is the window and there isn't another one this month.

The Atlantic at the Chatham elbow holds minus lows four mornings running — Aunt Lydia's Cove reads −0.5 Thursday and Friday, −0.4 Saturday, −0.3 Sunday, on a range that peaks Thursday at 6.8 feet. Bars come dry that spend most of the month underwater. That's the best seal-watching from shore you'll get, and it is also, for exactly the same reason, the best argument for keeping your feet on the sand.

Sky & tide

Sunrise creeps from 5:45 Thursday to 5:51 Wednesday. Sunset falls from 7:44 to 7:35. That's nine minutes of evening gone in seven days — a minute more than last week, and the pace keeps steepening from here. You'll feel it in the parking lots before you feel it anywhere else.

The moon comes off Wednesday's new and rebuilds: 0 percent, 2, 5, 11, 18, 27, and 37 at first quarter next Wednesday. (NWS Boston keeps the sun and moon tables for the whole month.)

And now the number I've been waiting all summer to print. The Sound is 78°. Cape Cod Bay is 74°. Seven days ago those buoys read 74 and 68. The Sound climbed four degrees in a week and the bay climbed six.

Which means I owe you a correction on a correction. Two weeks ago I wrote that the bay was quietly catching the Sound. Last week I took it back and told you the gap had doubled and that was on me. This week the bay closed four degrees of it in seven days. The truth was slower than my first call and better than my second, and the lesson — which I'll try to hold onto — is that one week is not a trend on a body of water that turns itself over twice a day.

Call the Atlantic backside off Nauset the low 60s. There's no reliable nearshore buoy out there and that's an honest estimate rather than a number I can hand you. This is the top of the year for all three. From here it only goes the other way.

Out on the water

The dark nights, and the last of them. Last week I told you Monday, Tuesday and Wednesday were the best shot at the glow since mid-July. Thursday and Friday nights are better — the moon is at zero and two percent, and after that it fattens every night until the window is shut. So this is it.

How to do it, since most people try once, see nothing, and conclude it's a myth: go after full dark, nine o'clock or later. Find still, shallow, protected water — a bayside harbor, the edge of Pleasant Bay, a landing where nothing's churning. Kill every light including your phone and give your eyes a full ten minutes. Then run a hand or a paddle through the water and watch behind the motion, not at it. It isn't a glow across a whole beach. It's a green-white spark that trails your fingers and goes out.

Sharks and seals. We are deep in white-shark season, and four straight minus mornings at the elbow will dry out bars that are usually under. Prime seal-counting from shore at Lighthouse Beach — and prime shark water for precisely that reason, because where the seals haul out, the sharks patrol. Check Sharktivity before you commit to anything on the Atlantic side, and the Seashore's shark-safety page is still the plainest four minutes of reading you'll do all summer.

And the part I said would go live. Two weeks ago I explained why the crook of Wellfleet and Eastham is one of the most reliable mass-stranding sites on earth: the extreme range and the long shallow flats mean the water goes out farther and faster here than almost anywhere, and an animal that reads the bottom wrong runs out of ocean before it knows it. Friday is the biggest range of the summer. If you're out on those flats at first light and you see something dark that shouldn't be there, don't push it, don't pull it, and don't wait — call the IFAW stranding hotline at 508-743-9548 and stay with the animal until somebody comes. Put it in your phone tonight, not Friday morning.

Rip risk: Low Thursday through Sunday, up a notch Monday and Tuesday. Southwest, northwest and north through the weekend is offshore or cross on the east-facing beaches and keeps the rip quiet at Nauset, Coast Guard, Marconi, Head of the Meadow and Ballston. Monday's south wind at 10 to 15 puts some energy in it. Tuesday's northeast is the first onshore air we've had in a fortnight — at 5 to 9 miles an hour it is a notch and not an alarm, and I'd rather tell you that plainly than let somebody else make a headline of it. NWS Boston posts the surf-zone call daily if you want it from the source.

The week, do's and don'ts

(This is the part to forward to the group chat.)

Do:

• Take Friday morning off. Minus 1.2 at 6:56, sun up at 5:46, northwest at 5 to 9, not a cloud in eight towns, and a 13.0-foot range — the biggest single swing of the summer. Brewster, Skaket, First Encounter, Wellfleet, Herring Cove. Anywhere on the bay works Friday.

• Then go back Friday evening. Minus 0.7 at 7:14 with sunset at 7:42. Twenty-eight minutes of low gold light on the widest sand of the year. Bring the camera and not much else.

• Take Saturday at 7:42 instead if Friday's hour is a bridge too far. −1.0 feet, sunny, north wind at 3 to 10. Two tenths shallower and forty-six minutes kinder.

• Fish the Morris Island ebb Saturday at 6:56 — 1.15 knots, the strongest water of the week. Friday at 6:08 and Sunday at 7:43 are nearly as good. After Monday it's not worth the gas.

• Get in the Sound Sunday or Wednesday. 78° at Hardings, Cockle Cove, Red River, Wychmere 🌊. This is the annual peak. It does not get warmer than this.

• Get in the bay too. 74° — six degrees warmer than it read last Thursday. First week all summer I'd send anybody to Linnell for the swimming rather than the walking.

• Go looking for the glow Thursday or Friday night. Zero percent moon and two percent. Nine o'clock, still water, all lights off, ten minutes of patience, then run your hand through it. There is no third night.

• Put 508-743-9548 in your phone before Friday. Biggest range of the summer, on the flats where strandings happen.

• Paddle Pleasant Bay Saturday afternoon — high water 4:26, light north wind, and the last of the negative lows behind you rather than under you.

Don't:

• Don't build anything on Monday. Showers and thunderstorms at 46 to 48 percent in all eight towns, south wind at 10 to 15, and a −0.1 low that's the first non-minus in five days. It's an errand day. Let it be one.

• Don't bother with the flats Tuesday or Wednesday. The lows are +0.5 and +1.0 and the range falls to 9.1 feet. The sand stays under water. Swim instead — both days are lovely for it.

• Don't wait for the next one. After Sunday morning there is no daylight minus tide on the bay until the second week of September. That's the whole point of Friday.

• Don't get cocky about Tuesday's northeast on Nauset, Coast Guard, Marconi, Head of the Meadow or Ballston. It's the first onshore wind in two weeks. Swim near a lifeguard and follow the flags.

• Don't swim where the seals are. Those dry bars at the elbow Thursday through Saturday are a seal exhibit, not a beach. Watch from shore and stay well back.

• Don't bring the dog to the Brewster flats. The town ban runs May 15 through September 15 — all beaches, ponds, landings and flats, 24 hours a day, parking lots included — and you need a beach permit on top of it. Four more weeks.

• Don't take my sunshine forecasts eight days out as gospel. See Thursday.

Shot of the week + your turn

Your turn, and I want two things this week. First: Friday evening, somebody is going to be standing on wet sand a long way out with the sun going down behind them at 7:42. That's the photograph of the summer and I'd like to run it. Send it with the beach and the town.

Second: did you find the glow? I sent a lot of you out Monday, Tuesday and Wednesday nights looking for it. Tell me yes or no and tell me which landing — I'm building a map of where it actually turns up on this Cape, one reply at a time, and a no is as useful to me as a yes.

Bottom line

Thursday's gone and it wasn't what I promised. Friday is: minus 1.2 at 6:56, minus 0.7 at 7:14, thirteen feet of range in between, and full sun over all of it. Saturday's the kinder copy at −1.0 and 7:42, with the week's strongest ebb at Morris Island the same hour. Sunday's the swim day at 78 degrees and the last minus tide you'll see in daylight until September.

Then it's over. Monday's wet, Tuesday and Wednesday are warm and flat, and the bay closes up until the leaves start turning. One morning this week is worth setting an alarm for. Set it.

Forward this to whoever you'd want standing out there with you at seven o'clock Friday morning — and to whoever's going to be annoyed on Saturday that nobody told them.

If somebody forwarded it to you: the Drift runs every Thursday, free, and refer three neighbors and I'll send you the tide cheat-card that lives on my own fridge.