Surf Forecasts:
Nantasket Beach surf forecast from 17 Aug 2026:
- Most powerful swell: Sunday 23 Aug, 11AM (local time) - 2.5ft (0.8m), 6s period, ENE swell with 42 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 Sunday (Aug 23) at 11AM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Sun 23rd Aug) | 2.5ft (0.8m) 6s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about Nantasket Beach over the next couple of weeks.
Honestly, it’s a pretty flat and frustrating run for the foreseeable future. The swell is tiny and weak, and the few times it tries to show something, the conditions just aren't there to back it up. We’re looking at a whole stretch with nothing really rideable, so if you’re jonesing for a wave, you might want to take up another hobby for a bit.
The water temp is sitting at 68.2°F in the first few days, which is pretty much average for this time of year, so no surprises there. The first week is a write-off. Monday the 17th has tiny 1.3 ft, 4-second windswell from the southeast and it's onshore and messy. Tuesday through to the weekend is more of the same – tiny, weak, and blown out with cross-shore or onshore winds. There's a moment late on Wednesday the 19th where it goes glassy, but the swell is only 1.6 ft on a 6-second period. You might get a knee-high slop, but it’s not worth the paddle.
We go through a period of next to nothing right through to the end of August. The best you can say is that from midday Sunday the 23rd through Tuesday the 25th, the wind goes clean offshore or cross-off, and the little 0.7 ft to 3.0 ft blips from the east and southeast have some long-period energy (11 to 12 seconds) behind them on the 23rd and 24th, but the size is just not there. On Tuesday afternoon the 25th, there’s a tiny pulse of 3.0 ft from the SE with clean wind, but the combined energy is only 48 – weak.
The only time things start to look slightly interesting is right at the back end of the forecast. On Friday the 28th, the swell from the east gets a bit of legs, building to 2.3 ft with a long 14-second period. The combined energy jumps up to 216, which is moderate energy, but it's coming with a 12 mph cross-onshore wind from the ENE, so it'll be a choppy mess. With that size, it’s still okay for intermediates if you can handle the chop, but it’s messy water.
Honestly, for this entire 16-day stretch, there isn't a single standout. The best on offer is that Friday the 28th if you're desperate, but the wind wrecks it for good quality waves. The swells are mostly short-period and weak, and the one time we get a bit of energy, the wind is against us. For a consistent spot like Nantasket, this is a rough spell, but it won’t last forever. Go clean your board.
Short Range ForecastMostly dry. Warm (max 30°C on Wed afternoon, min 19°C on Mon afternoon). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 55mm), heaviest during Fri afternoon. Warm (max 21°C on Thu afternoon, min 15°C on Fri night). Winds increasing (calm on Thu night, fresh winds from the NNE by Fri afternoon). | |||||||||||||||||||
Mon 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 | ESE 4 | ESE 4 | ESE 9 | ESE 7 | ESE 6 | E 6 | ESE 6 | ESE 8 | ESE 8 | E 8 | E 8 | E 8 | E 8 | E 5 | E 5 | E 6 | ENE 6 | ENE 6 | E 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 2 | 4 | 3 | 15 | 9 | 13 | 12 | 12 | 19 | 11 | 19 | 21 | 21 | 19 | 21 | 34 | 30 | 42 | 31 | 11 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | glassy | glassy | glassy | glassy | cross-on | on | cross | cross-on | cross-on | cross | cross-on | on | on | on | cross-on | cross-off |
High Tide | 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 | 7:41AM2.26m | 7:49PM2.62m | 8:40AM2.27m | 8:46PM2.66m | |||||||
Low Tide | 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 | 1:31PM0.69m | 2:27AM0.45m | 2:28PM0.67m | 3:22AM0.40m | |||||||
 |  |  |  |  | | | | |  |  |  | | | | | | |  | | |
 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — |
 | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — |
mm | — | — | — | — | — | — | — | — | — | 2 | 4 | 14 | 35 | — | — | — | — | — | 1 | — |
Temp °C | 20 | 20 | 21 | 22 | 20 | 25 | 30 | 28 | 22 | 21 | 20 | 18 | 16 | 16 | 18 | 19 | 18 | 18 | 17 | 18 |
Feels °C | 21 | 21 | 21 | 23 | 22 | 27 | 30 | 28 | 23 | 20 | 23 | 18 | 12 | 14 | 17 | 17 | 18 | 16 | 18 | 19 |
Swell 1 Height (m) Direction Period (s) | E 9 | ESE 4 | ESE 4 | NE 4 | ENE 4 | ESE 6 | E 6 | ESE 6 | ESE 8 | ESE 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 6 | E 12 | ENE 6 | ENE 5 |
| kJ | 2 | 4 | 3 | 3 | 3 | 13 | 12 | 12 | 19 | 11 | 19 | 21 | 21 | 19 | 10 | 5 | 30 | 12 | 31 | 8 |
Swell 2 Height (m) Direction Period (s) | — | E 9 | SE 8 | ESE 9 | ESE 7 | E 8 | E 8 | E 8 | — | — | E 9 | E 4 | ESE 4 | ESE 4 | E 13 | E 13 | E 13 | — | E 12 | E 12 |
| kJ | — | 2 | 3 | 15 | 9 | 6 | 5 | 5 | — | — | 2 | 1 | 4 | 7 | 3 | 3 | 3 | — | 11 | 11 |
Swell 3 Height (m) Direction Period (s) | — | — | — | ESE 4 | ESE 9 | NE 4 | NE 4 | E 5 | — | — | — | E 15 | E 14 | E 14 | — | — | — | — | E 8 | E 7 |
| kJ | — | — | — | 2 | 7 | 1 | 1 | 2 | — | — | — | 4 | 4 | 4 | — | — | — | — | 1 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | NNE 3 | NNE 3 | — | — | — | — | — | NE 3 | — | — | E 4 | — | E 5 | E 5 | — | ENE 6 | — | — |
| kJ | — | — | 1 | 2 | — | — | — | — | — | 2 | — | — | 10 | — | 21 | 34 | — | 42 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 117 | 117 | 113 | 113 | 55 | 58 | 523 | 58 | 165 | 961 | 85 | 336 | 470 | 64 | 677 | 653 | 55 | 263 | 108 | 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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