Surf Forecasts:
Nantasket Beach surf forecast from 15 Aug 2026:
- Most powerful swell: Friday 21 Aug, 8AM (local time) - 1.5ft (0.5m), 7s period, E swell with 21 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 0.5m 7s and forecast to arrive on Friday (Aug 21) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Monday (Aug 17) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Fri 21st Aug) | 1.5ft (0.5m) 7s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
Well, folks, Rusty here. Let’s be straight with you – Nantasket Beach is looking like a tough stretch over the next couple of weeks. The swell is just not cooperating, and we’re staring down a long, quiet period. Don’t expect to be paddling out much, if at all.
Right now, starting from Saturday the 15th, the water temperature off Nantasket Beach is sitting at 69°, which is pretty much bang on average for this time of year – nothing unusual there. But the surf? Almost non-existent. We’ve got tiny swells, mostly around 0.3 ft, and the wind is either cross-on or onshore, making for poor, choppy conditions. The wave energy is weak, with values like 6 or 3 – that’s barely a ripple. This flat spell drags on through the weekend and into the start of the week.
Come Monday the 17th, we finally see a slight bump, with the swell hitting 2 ft in the afternoon, but it’s short period at 5 seconds and the wind is light cross-shore. Still, the energy is weak (17) and the surf is poor. Tuesday and Wednesday are more of the same – tiny waves, light winds, and nothing to get excited about.
There’s a glimmer of hope on Friday the 21st with a bump to 3 ft from the northeast, but the period is a short 5 seconds and the wind is cross-onshore, making it choppy. The wave energy is still weak (51). It’s not really surfable, and the conditions are poor. The following days just see a slow decline back to flatness.
The second week is just as barren. From Saturday the 22nd right through to the end of the month, we’re stuck with swells barely reaching 3 ft, short periods, and mostly onshore or cross-onshore winds. The wave energy never gets above 54, and it’s all “poor surf conditions.” There’s a brief moment on the morning of Wednesday the 26th where the wind goes glassy, but the swell is still only 0.7 ft – not enough for a wave.
Honestly, there isn’t a single standout session in this 16-day window. The best day might be Friday the 21st, but even that’s a stretch. If you’re desperate for a paddle, you might find a tiny ankle-biter, but don’t kid yourself. The consistent lack of any decent swell and the persistent poor wind mean this is a real blank run for Nantasket. It’s a tough one, but sometimes the ocean just doesn’t play ball.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Mon afternoon. Warm (max 26°C on Sun afternoon, min 18°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Thu morning. Warm (max 31°C on Wed afternoon, min 19°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | ||||||||||||||
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 9 | E 9 | E 9 | SSE 3 | E 9 | SE 5 | SE 4 | ESE 4 | E 5 | ENE 4 | ENE 4 | ESE 6 | ESE 6 | E 8 | ESE 6 | ESE 7 | ESE 7 | E 9 | E 5 | E 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2 | 2 | 2 | 7 | 1 | 6 | 3 | 3 | 11 | 12 | 7 | 13 | 8 | 5 | 8 | 10 | 15 | 8 | 18 | 14 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross-on | cross | cross | cross | glassy | cross-off | cross-on | on | cross-off | cross-off | cross-off | cross-off | glassy | on | cross | cross-on | cross-on | cross-on |
High Tide | 2:16AM3.09m | 2:42PM3.06m | 3:04AM2.92m | 3:27PM2.98m | 3:54AM2.73m | 4:15PM2.89m | 4:47AM2.55m | 5:05PM2.78m | 5:44AM2.40m | 5:58PM2.69m | 6:41AM2.30m | 6:52PM2.64m | ||||||||
Low Tide | 8:03PM-0.07m | 8:28AM-0.10m | 8:52PM0.01m | 9:12AM0.06m | 9:42PM0.11m | 9:59AM0.24m | 10:35PM0.22m | 10:48AM0.41m | 11:31PM0.33m | 11:40AM0.55m | 00:28AM0.41m | 12:35PM0.65m | 1:27AM0.45m | |||||||
 |  |  | |  |  |  | |  | |  | | |  |  |  | | | |  | |
 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — |
 | 7:45 | — | — | 7:43 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — |
mm | — | — | — | — | 1 | 2 | 8 | 1 | — | — | — | — | — | — | 10 | 2 | — | — | 2 | 3 |
Temp °C | 23 | 21 | 22 | 26 | 23 | 20 | 21 | 21 | 20 | 22 | 20 | 27 | 31 | 26 | 21 | 22 | 22 | 20 | 17 | 17 |
Feels °C | 20 | 19 | 22 | 22 | 21 | 19 | 22 | 23 | 20 | 23 | 21 | 27 | 30 | 25 | 24 | 24 | 23 | 18 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | NNE 4 | — | — | E 9 | E 9 | E 9 | E 9 | ESE 4 | E 5 | ESE 8 | ENE 4 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | ESE 6 | E 5 | E 5 |
| kJ | 1 | — | — | 2 | 1 | 2 | 2 | 3 | 11 | 6 | 7 | 13 | 8 | 4 | 8 | 10 | 15 | 8 | 18 | 14 |
Swell 2 Height (m) Direction Period (s) | E 9 | — | E 9 | — | — | — | — | SE 4 | ESE 8 | — | ESE 6 | ENE 4 | ESE 8 | E 8 | E 8 | E 10 | ENE 4 | E 9 | E 8 | E 8 |
| kJ | 2 | — | 2 | — | — | — | — | 1 | 6 | — | 4 | 2 | 7 | 5 | 5 | 2 | 1 | 6 | 5 | 11 |
Swell 3 Height (m) Direction Period (s) | — | E 9 | — | — | — | — | — | E 9 | — | — | E 8 | E 7 | NE 4 | E 4 | — | — | — | E 15 | E 14 | E 14 |
| kJ | — | 2 | — | — | — | — | — | 2 | — | — | 1 | 1 | 1 | 2 | — | — | — | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | SSE 3 | SSE 4 | SE 5 | SE 4 | — | NNE 3 | ENE 4 | — | — | — | — | NNE 3 | NE 4 | — | ENE 4 | — | — |
| kJ | — | — | — | 7 | 1 | 6 | 3 | — | 3 | 12 | — | — | — | — | 1 | 5 | — | 6 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1828 | 3546 | 1725 | 1679 | 1842 | 1634 | 55 | 55 | 90 | 67 | 131 | 58 | 113 | 653 | 67 | 117 | 961 | 181 | 273 | 618 |
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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