Surf Forecasts:
Nantasket Beach surf forecast from 21 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 11AM (local time) - 3.5ft (1.1m), 6s period, E swell with 75 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 1.1m 6s and forecast to arrive on Saturday (Aug 22) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Monday (Aug 24) at 11PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sat 22nd Aug) | 3.5ft (1.1m) 6s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
Well, folks, it's a tough one to write today. I've been staring at the charts for Nantasket Beach, and honestly, I'm struggling to find a single decent wave in the whole 16-day window. It's a real bummer, but I gotta call it like I see it.
Right now, the water temp is sitting at about 70°, which is right around the long-term average for late August, so at least the water is comfy if you fancy a swim. But for surfing? It's a total blank. We're looking at flat, tiny surf for the entire period. The biggest bump we see is a meager 4 ft swell on Saturday the 22nd, but that's coming from the east with a paltry 6-second period and a 20 km/h cross-onshore wind. The combined energy is a weak 84, so it's just washed-out, choppy junk. The rest of the days are mostly 0.7 ft or 1 ft. Even when the wind goes offshore or glassy, like on the morning of Friday the 28th, the swell is just microscopic. We've got a long stretch of absolutely nothing rideable here.
This kind of extended flat spell is pretty normal for Nantasket. It's a consistent break, but it can go quiet for a while. Don't hold your breath for any of these dates to turn around. The only thing that might be worth a look is the late-Friday morning of the 28th when it's glassy, but with 1.0 ft of swell, there's nothing to surf. For now, I'd say this setup looks more interesting for a paddleboard or a kite than a surfboard. It's a total bust.
Rusty
Short Range ForecastModerate rain (total 12mm), heaviest on Fri morning. Warm (max 22°C on Sun afternoon, min 17°C on Sat afternoon). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon afternoon, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
AM | 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 8 | E 8 | E 8 | E 6 | E 6 | E 6 | E 5 | E 12 | ESE 6 | E 6 | ESE 6 | E 6 | E 11 | E 11 | E 11 | ESE 6 | E 6 | E 12 | E 11 | E 9 | ESE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 22 | 21 | 20 | 75 | 50 | 21 | 14 | 11 | 29 | 20 | 13 | 13 | 9 | 9 | 9 | 4 | 3 | 11 | 9 | 6 | 14 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross | cross-off | on | cross-on | off | cross-off | off | off | off | off | off | off | cross-on | cross-off | cross-on | cross-on | cross-on |
High Tide | 6:52PM2.64m | 7:41AM2.26m | 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 | ||||||||
Low Tide | 12:35PM0.65m | 1:27AM0.45m | 1:31PM0.69m | 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 | ||||||||
 |  |  | | |  | |  |  |  |  |  | | | | | | | | | | |
 | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — |
 | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:30 | — | — | 7:29 | — | — | 7:28 | — | — | 7:25 | — |
mm | 3 | — | 2 | 3 | 2 | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 19 | 20 | 19 | 19 | 17 | 17 | 20 | 22 | 22 | 24 | 27 | 23 | 22 | 23 | 22 | 23 | 25 | 23 | 24 | 25 | 21 |
Feels °C | 19 | 20 | 20 | 18 | 15 | 17 | 21 | 24 | 25 | 21 | 23 | 20 | 20 | 20 | 20 | 22 | 24 | 22 | 23 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | ESE 5 | E 8 | E 6 | E 6 | E 5 | ENE 5 | ESE 6 | E 6 | ESE 6 | E 6 | E 6 | E 6 | ESE 7 | ESE 6 | E 6 | ESE 6 | E 11 | E 9 | ESE 8 |
| kJ | 22 | 21 | 7 | 6 | 50 | 21 | 14 | 10 | 29 | 20 | 13 | 13 | 7 | 7 | 4 | 4 | 3 | 4 | 9 | 6 | 14 |
Swell 2 Height (m) Direction Period (s) | — | ESE 4 | E 8 | E 13 | E 13 | NNE 4 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 | E 11 | E 11 | E 6 | E 10 | E 12 | E 12 | ESE 7 | SE 7 | — |
| kJ | — | 3 | 20 | 3 | 3 | 7 | 12 | 11 | 11 | 11 | 10 | 9 | 9 | 9 | 3 | 2 | 3 | 11 | 4 | 2 | — |
Swell 3 Height (m) Direction Period (s) | E 15 | E 14 | E 14 | — | — | E 8 | NNE 4 | E 7 | — | ESE 12 | E 8 | S 3 | SE 6 | ESE 7 | E 11 | E 6 | E 10 | — | E 11 | E 11 | E 10 |
| kJ | 4 | 4 | 4 | — | — | 5 | 2 | 4 | — | 13 | 1 | 1 | 5 | 5 | 9 | 1 | 2 | — | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | ENE 3 | NE 3 | NE 4 | E 6 | NNE 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SSE 3 |
| kJ | 1 | 3 | 2 | 75 | 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 523 | 893 | 67 | 893 | 7 | 12 | 844 | 360 | 12 | 55 | 58 | 55 | 844 | 58 | 160 | 1236 | 1230 | 523 | 655 | 884 | 523 |
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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