Surf Forecasts:
Nantasket Beach surf forecast from 11 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 2AM (local time) - 3.5ft (1.1m), 5s period, NE swell with cross-offshore winds.
- Most powerful swell: Monday 17 Aug, 11PM (local time) - 4ft (1.2m), 5s period, NNE swell with 78 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 2AM (local time) - 3.5ft (1.1m), 5s period with NE swell.
Best Forecast Surf Conditions for Nantasket Beach this week:
The surf forecast for Nantasket Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 2AM. The primary swell is predicted to be 1.1m and 5s period with a secondary swell of 0.9m and 5s. Another secondary swell of 0.1m and 9s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Nantasket Beach in the next 16 days are 1.2m 5s and forecast to arrive on Monday (Aug 17) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 2s period and expected on Tuesday (Aug 11) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Tue 18th Aug) | 3.5ft (1.1m) 5s |
| Best Surf | 2AM (Tue 18th Aug) | 3.5ft (1.1m) 5s |
| Most Powerful | 11PM (Mon 17th Aug) | 4ft (1.2m) 5s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
Alright, let’s get into it, folks. This is Rusty, and I’m lookin’ at a grim stretch ahead for our local waters.
Right off the bat, we’ve got a serious dry spell. From now through the morning of Monday, the 17th of August, there is absolutely nothing worth paddling out for. Every session is rated as poor surf conditions, with waves scraping in at a measly 0.3ft to 2.3ft. The combined swell energy is pitiful, stuck between 2 and 29 – that’s about as weak as it gets. Just a whole lot of flat, gutless water.
On Tuesday the 18th of August, we finally get a flicker of hope. Nantasket Beach sees a pulse of swell push through, with the morning looking like the only real chance. Swell heights jump to 4.9ft, coming from the NNE with a period of 6 seconds. The combined energy hits a moderate 341 – a huge jump from the nothing we’ve had. The wind goes glassy, with a slight air, so the surface will be clean. The setup here is a consistent beach break, exposed to the NE, and the offshore wind direction is W, which is a positive for keeping things tidy. This is the standout of the whole forecast, but honestly, it’s a short window. By the afternoon, the wind shifts onshore from the ESE at 9 mph, and the quality drops off a cliff. Keep in mind, this is an intermediate break, and with 4.9ft surf, it’s right on the edge of being too much for total beginners, but it's manageable.
The rest of the window? You’re looking at a long, uneventful slog. From Wednesday the 19th all the way through to the end on Wednesday the 26th of August, it's back to poor surf conditions. Swell heights rarely break 2ft, and the energy values are consistently weak, down in the double digits. The wind is all over the place – cross-offs, cross-ons, and onshore – nothing that’ll build a decent wave. There are a few glassy moments on Saturday the 22nd morning with a gentle offshore, but the swell is just too tiny (0.7ft) to do anything with.
So here’s the bottom line: if you’re desperate, you’ve got that Tuesday morning, the 18th of August, at Nantasket Beach. It’s your best and only real shot this whole period. Other than that, the boards are staying dry.
Short Range ForecastLight rain (total 7mm), mostly falling on Thu night. Warm (max 30°C on Tue afternoon, min 20°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 12mm), heaviest on Sun night. Warm (max 26°C on Fri afternoon, min 18°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 9 | E 9 | E 9 | E 15 | E 9 | E 11 | E 14 | E 13 | E 13 | E 13 | E 13 | N 4 | NNE 5 | NE 5 | E 9 | E 9 | E 9 | SE 4 | E 5 | NE 5 | NE 5 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 2 | 2 | 4 | 1 | 2 | 4 | 3 | 3 | 4 | 4 | 8 | 14 | 12 | 2 | 2 | 2 | 20 | 17 | 35 | 74 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | cross-off | cross-on | cross-on | off | glassy | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | on | cross-off | glassy | cross-off | cross-off | cross | cross-on | cross-off |
High Tide | 10:34AM2.78m | 10:48PM3.30m | 11:28AM2.90m | 11:43PM3.33m | 12:20PM3.00m | 00:36AM3.31m | 1:10PM3.07m | 1:27AM3.23m | 1:57PM3.08m | 2:16AM3.09m | 2:42PM3.06m | 3:04AM2.92m | 3:27PM2.98m | 3:54AM2.73m | |||||||
Low Tide | 4:29PM0.08m | 5:15AM-0.25m | 5:25PM-0.02m | 6:07AM-0.30m | 6:20PM-0.08m | 6:56AM-0.29m | 7:12PM-0.10m | 7:43AM-0.22m | 8:03PM-0.07m | 8:28AM-0.10m | 8:52PM0.01m | 9:12AM0.06m | 9:42PM0.11m | ||||||||
 | |  | |  | | |  |  | | |  | | | | |  |  |  | | | |
 | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — |
 | — | 7:50 | — | — | 7:49 | — | — | 7:47 | — | — | 7:45 | — | — | 7:45 | — | — | 7:43 | — | — | 7:42 | — |
mm | — | — | — | — | — | — | — | 1 | 6 | — | — | — | — | — | — | — | — | 12 | 2 | — | — |
Temp °C | 28 | 30 | 27 | 25 | 26 | 24 | 27 | 28 | 23 | 23 | 26 | 22 | 22 | 23 | 22 | 22 | 26 | 22 | 17 | 20 | 20 |
Feels °C | 26 | 27 | 26 | 24 | 24 | 23 | 27 | 28 | 23 | 19 | 22 | 17 | 19 | 21 | 20 | 21 | 24 | 20 | 15 | 18 | 20 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 7 | E 7 | E 8 | E 8 | — | E 10 | E 10 | E 10 | SE 10 | SE 10 | E 9 | NNE 5 | NE 5 | NNE 4 | E 9 | E 9 | NE 4 | E 5 | SE 8 | NE 5 |
| kJ | 1 | 1 | 1 | 1 | 1 | — | 2 | 2 | 2 | 4 | 4 | 2 | 14 | 12 | 2 | 2 | 2 | 1 | 17 | 3 | 49 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | — | E 8 | — | E 8 | E 14 | E 13 | E 13 | E 13 | E 13 | — | SE 9 | SE 9 | — | — | — | — | E 9 | SE 8 | SE 9 |
| kJ | 2 | 2 | — | 1 | — | 1 | 4 | 3 | 3 | 3 | 3 | — | 3 | 3 | — | — | — | — | 2 | 10 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | E 9 | E 15 | E 9 | E 11 | E 7 | E 7 | — | — | SE 9 | E 12 | E 12 | — | E 9 | — | — | — | S 7 | — | E 18 |
| kJ | — | — | 2 | 4 | 1 | 2 | 1 | 1 | — | — | 3 | 3 | 3 | — | 2 | — | — | — | 1 | — | 6 |
Wind waves Height (m) Direction Period (s) | WNW 2 | — | — | — | — | — | — | — | — | — | — | N 4 | — | — | — | — | — | SE 4 | — | NE 5 | NE 5 |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | 8 | — | — | — | — | — | 20 | — | 35 | 74 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 523 | 1051 | 2511 | 653 | 655 | 950 | 578 | 2733 | 1842 | 653 | 890 | 984 | 186 | 98 | 85 | 165 | 531 | 1236 | 1230 | 67 | 90 |
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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