Surf Forecasts:
Nantasket Beach surf forecast from 22 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 8PM (local time) - 2.5ft (0.8m), 6s period, E swell with 38 kJ wave energy.
Best Forecast Surf Conditions for Nantasket Beach this week:
The most powerful waves expected at Nantasket Beach in the next 16 days are 0.8m 6s and forecast to arrive on Saturday (Aug 22) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Monday (Aug 24) at 5PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 22nd Aug) | 2.5ft (0.8m) 6s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
Alright, let’s get to it. Rusty here.
Right off the bat, I’ll level with you: this 16-day window for Nantasket Beach is a tough one. There’s a long stretch of flat, messy, or just plain poor surf for the first two weeks, and it’s not until the very end of the period that we see a glimmer of something worth paddling out for.
From Saturday, August 22, all the way through to Friday, September 4, the surf is mostly a write-off. Swell heights hover around 0.7 ft to 3 ft, with periods mostly under 8 seconds, so it’s weak, short-period windswell, and the combined energy is often in the two-digit range (16 to 69). The wind is a mixed bag – cross-onshore, onshore, or cross-off at best – and the water’s only got a little bit of life when the brief pulses come through. The morning of Tuesday, August 25, has a clean cross-off breeze with a 0.7 ft, 11-second groundswell, but at that size, it’s barely a ripple. The water temperature is about 70°, which is normal for this time of year, so no surprises there.
The real gap in quality surf runs from August 22 through to the morning of September 5. That’s nearly two weeks of nothing worthwhile. A few afternoons in late August and early September show clean conditions, but the swell is too small or too weak to ride.
Now, the standout. The morning of Saturday, September 5, is the only time in this forecast that looks like it’s worth getting excited about. Nantasket Beach picks up a 5 ft swell from the ENE, with a period of just 7 seconds – so it’s a short-period windswell, not a groundswell, and the combined energy reads 358 (moderate wave energy). That’s a solid, punchy wave for intermediate surfers, but at 5 ft, it’s a bit much for beginners. The wind is calm, glassy – zero, dead calm – so the surface will be clean as a whistle. The tide and conditions should make for some fun, lined-up waves, especially on the sandbars. This is the best on offer, no question. Weekend crowds are likely though, so expect company.
Beyond that, the morning of September 4 has a 4 ft ESE swell with a 7-second period and combined energy of 202 (moderate), but the light cross-onshore wind and marginal marks mean it’s only a ‘maybe’ for the keen ones.
To sum it up: if you can wait, the morning of September 5 is the one to aim for. Everything else in this outlook is a pass.
Rusty
Short Range ForecastModerate rain (total 12mm), heaviest on Sun morning. Warm (max 28°C on Mon afternoon, min 17°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Wed afternoon, min 16°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | E 6 | ENE 5 | E 5 | ESE 5 | E 5 | E 6 | E 6 | E 11 | E 11 | E 11 | E 11 | ESE 9 | ESE 8 | ESE 8 | ESE 7 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 38 | 27 | 34 | 32 | 12 | 21 | 12 | 9 | 9 | 9 | 9 | 15 | 22 | 22 | 11 | 13 | 15 | 16 | 14 | 12 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | cross-off | cross-off | cross | cross | cross | on | on | off |
High Tide | 7:49PM2.62m | 8:40AM2.27m | 8:46PM2.66m | 9:34AM2.33m | 9:38PM2.73m | 10:18AM2.43m | 10:23PM2.82m | 10:58AM2.54m | 11:04PM2.90m | 11:35AM2.65m | 11:43PM2.96m | 12:11PM2.76m | 00:22AM3.00m | |||||||
Low Tide | 2:27AM0.45m | 2:28PM0.67m | 3:22AM0.40m | 3:21PM0.60m | 4:08AM0.32m | 4:08PM0.50m | 4:47AM0.23m | 4:49PM0.39m | 5:23AM0.14m | 5:30PM0.28m | 5:59AM0.07m | 6:10PM0.18m | ||||||||
 |  |  |  |  |  | |  |  | | | | | |  | |  | | | | |
 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — |
 | 7:34 | — | — | 7:32 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:25 | — | — | 7:23 | — |
mm | 2 | — | 6 | 2 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 18 | 20 | 26 | 24 | 25 | 28 | 23 | 23 | 23 | 21 | 22 | 27 | 25 | 24 | 27 | 23 | 23 | 24 | 23 |
Feels °C | 19 | 18 | 21 | 28 | 26 | 22 | 24 | 20 | 20 | 20 | 18 | 20 | 25 | 24 | 24 | 24 | 22 | 24 | 24 | 26 |
Swell 1 Height (m) Direction Period (s) | E 6 | ENE 5 | E 5 | E 5 | E 5 | E 6 | E 6 | E 6 | E 6 | E 6 | ESE 6 | ESE 9 | ESE 8 | ESE 8 | ESE 7 | ESE 8 | ESE 9 | ESE 9 | ESE 8 | ESE 8 |
| kJ | 38 | 27 | 20 | 23 | 12 | 21 | 12 | 7 | 3 | 3 | 4 | 15 | 22 | 22 | 11 | 13 | 15 | 16 | 14 | 12 |
Swell 2 Height (m) Direction Period (s) | E 13 | E 8 | E 12 | E 12 | E 12 | E 12 | SE 4 | E 11 | ESE 7 | ESE 6 | E 11 | E 6 | E 12 | E 12 | E 9 | E 11 | SSE 3 | E 10 | — | ESE 3 |
| kJ | 3 | 5 | 12 | 11 | 11 | 11 | 4 | 9 | 4 | 4 | 9 | 1 | 3 | 3 | 7 | 2 | 1 | 2 | — | 1 |
Swell 3 Height (m) Direction Period (s) | — | E 13 | — | SE 8 | SE 8 | — | E 11 | — | E 11 | E 11 | E 6 | E 13 | — | — | E 11 | E 8 | E 11 | — | — | — |
| kJ | — | 3 | — | 3 | 3 | — | 10 | — | 9 | 9 | 3 | 3 | — | — | 2 | 1 | 2 | — | — | — |
Wind waves Height (m) Direction Period (s) | NNE 3 | — | E 5 | ESE 5 | SSE 4 | — | SW 2 | — | — | — | — | — | — | SW 4 | — | — | S 3 | — | SE 3 | — |
| kJ | 4 | — | 34 | 32 | 5 | — | 1 | — | — | — | — | — | — | 1 | — | — | 2 | — | 5 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 81 | 12 | 359 | 7 | 55 | 26 | 58 | 55 | 58 | 55 | 58 | 58 | 55 | 55 | 79 | 549 | 55 | 113 | 40 | 58 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Nantasket Beach Surf forecast
The above surf forecast table for Nantasket Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nantasket Beach can be found by selecting the local surf guide option on the grey menu. Our Nantasket Beach surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Nantasket Beach) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Nantasket Beach may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Nantasket Beach is 8 km (5 miles) from the city of Hingham. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Hingham. Hingham has rooms for a wide range of budgets as well as car hire and transport links.
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