Surf Forecasts:
Nantasket Beach surf forecast from 18 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 8AM (local time) - 1.5ft (0.5m), 8s period, E swell with 29 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 8s and forecast to arrive on Saturday (Aug 22) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sat 22nd Aug) | 1.5ft (0.5m) 8s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what the charts are telling us for the Nantasket Beach area.
Honestly, it's a tough stretch ahead. We're looking at a solid 16-day window, but the opening act is a real bummer. For the first week and a half, from Tuesday the 18th right through to the end of August, there's nothing worth paddling out for. The energy is weak, with the combined swell energy barely getting out of double digits most days, and the swell heights are sitting at a measly 1 ft to 3 ft. The wind is messy with that nasty cross-onshore component ruining any chance of a clean wave. It’s just a whole lot of nothing. You’d be better off cleaning the wax off your board.
After that long, flat spell, we finally see a pulse of energy arriving on Monday the 31st of August. The morning is the standout for the whole forecast period. We've got a glassy, dead-calm wind and a building swell that’s pushing 4 ft from the NE. The combined energy is a solid 102, meaning there's finally some moderate power in the water. The water temp is about 68°, which feels pretty normal for this time of year. The downside? The swell has a short period of just 6 seconds – that’s windswell, so expect it to be a bit bouncy and lacking that real wall. Nantasket Beach is an exposed spot, so it’ll pick up anything going, but don't expect perfection.
Now, Monday afternoon the wind shifts onshore and choppy, and Tuesday the 1st of September is back to being blown out. There's a tease of a more long-period, 12-second swell arriving on Wednesday the 2nd of September, but by then the main energy has faded.
When you add it all up, there’s really only one window that’s worth a look: Monday the 31st of August morning. It’s not a classic, but it’s the best we’ve got. The rest of the time, save your gas.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Warm (max 31°C on Wed afternoon, min 17°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Sun night. Warm (max 21°C on Fri afternoon, min 17°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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) | ESE 4 | ESE 9 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ENE 4 | E 8 | E 8 | E 8 | E 5 | E 5 | E 5 | E 12 | E 12 | E 11 | E 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 16 | 9 | 8 | 8 | 7 | 12 | 11 | 19 | 24 | 13 | 11 | 10 | 10 | 18 | 12 | 14 | 11 | 11 | 10 | 9 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross-off | off | cross-off | off | glassy | off | cross-on | on | glassy | cross-on | cross-on | cross | cross | glassy | on | cross-off | cross-off | cross-off |
High Tide | 4:15PM2.89m | 4:47AM2.55m | 5:05PM2.78m | 5:44AM2.40m | 5:58PM2.69m | 6:41AM2.30m | 6:52PM2.64m | 7:41AM2.26m | 7:49PM2.62m | 8:40AM2.27m | 8:46PM2.66m | 9:34AM2.33m | 9:38PM2.73m | ||||||||
Low Tide | 9:59AM0.24m | 10:35PM0.22m | 10:48AM0.41m | 11:31PM0.33m | 11:40AM0.55m | 00:28AM0.41m | 12:35PM0.65m | 1:27AM0.45m | 1:31PM0.69m | 2:27AM0.45m | 2:28PM0.67m | 3:22AM0.40m | 3:21PM0.60m | 4:08AM0.32m | |||||||
 | |  |  | | |  |  |  | | | | | |  | | |  | | | | |
 | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:30 | — |
mm | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 4 | 2 | — | — |
Temp °C | 22 | 23 | 21 | 27 | 31 | 27 | 23 | 23 | 23 | 20 | 21 | 20 | 20 | 20 | 18 | 18 | 20 | 19 | 23 | 27 | 24 |
Feels °C | 23 | 24 | 22 | 27 | 29 | 27 | 24 | 25 | 23 | 17 | 19 | 20 | 19 | 18 | 17 | 18 | 22 | 21 | 21 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | ESE 4 | E 4 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ENE 4 | ENE 4 | E 8 | E 8 | E 5 | E 7 | E 5 | ENE 4 | ESE 6 | ESE 6 | ESE 5 |
| kJ | 3 | 3 | 9 | 8 | 8 | 7 | 12 | 11 | 19 | 21 | 13 | 6 | 10 | 10 | 18 | 4 | 11 | 6 | 4 | 4 | 3 |
Swell 2 Height (m) Direction Period (s) | E 8 | ESE 9 | ESE 9 | E 8 | E 8 | ESE 8 | — | — | — | E 15 | E 8 | E 8 | E 13 | E 13 | E 7 | E 12 | E 7 | E 7 | ENE 4 | E 11 | E 11 |
| kJ | 1 | 16 | 8 | 6 | 6 | 6 | — | — | — | 4 | 12 | 11 | 3 | 3 | 10 | 12 | 4 | 4 | 2 | 10 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | ESE 9 | — | — | — | — | — | — | — | E 14 | E 14 | — | — | E 13 | — | E 12 | E 12 | E 12 | NE 4 | SE 6 |
| kJ | — | — | 8 | — | — | — | — | — | — | — | 4 | 4 | — | — | 3 | — | 11 | 11 | 11 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | S 2 | — | — | — | — | NE 4 | — | — | NE 3 | ENE 4 | — | E 5 | E 4 | — | — | — | — |
| kJ | — | — | — | — | 2 | — | — | — | — | 24 | — | — | 3 | 6 | — | 12 | 14 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 98 | 113 | 55 | 58 | 58 | 55 | 58 | 58 | 58 | 523 | 213 | 67 | 560 | 805 | 108 | 67 | 18 | 58 | 58 | 67 | 67 |
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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