Surf Forecasts:
Nantasket Beach surf forecast from 9 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 2.5ft (0.7m), 4s period, N swell with 20 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 0.7m 4s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Saturday (Aug 15) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 16th Aug) | 2.5ft (0.7m) 4s |
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 the stretch ahead for Nantasket Beach.
Right off the bat, I gotta be straight with you—this 16-day window is a tough one. We’ve got a big, long gap with next to nothing to get excited about. The first real sign of life doesn’t show up until Tuesday the 18th, and even then, it’s messy. That’s a solid week and a half of flat, tiny, or just plain ugly conditions starting from now.
The first hint of any size comes on the morning of the 18th with a little pulse from the ENE pushing about 5 ft, but the period is short at 6 seconds. The wind is light and cross, which isn’t terrible, but the combined energy is moderate (117). The afternoon gets a bit bigger, 6 ft, but the period stays short and the wind swings onshore, making it choppy. Honestly, for a beach break, this short-period stuff with cross-onshore wind is more of a kite session than a surf session. The water temp is around 70°, which is bang on average for this time of year.
The only real standout in the whole run, and I mean the *only* one worth pointing a board at, is Saturday morning, the 22nd. It’s not huge, about 4 ft from the NNE with a short 6-second period, but the key here is the wind. Glassy. Dead calm. That combined energy reading is moderate (160), and for Nantasket, clean, glassy conditions can make even a modest swell a lot of fun. The water will still be feeling about average for late August. Just keep in mind, this is a spot that can get crowded when it's good, and with it being one of the only decent windows, expect plenty of company.
After that, it drops off again quickly into the last days of the window with tiny, onshore junk.
So here’s the takeaway: don’t hold your breath this week. Mark your calendar for Saturday morning the 22nd. That glass-off window is your best shot. It ain’t huge, but it’ll be clean. Everything else is flat, wind-blown, or just plain ordinary. Forecasts can change, but as it stands, this is a lean stretch for Nantasket.
Rusty.
Short Range ForecastMostly dry. Warm (max 33°C on Sun afternoon, min 21°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Thu morning. Warm (max 28°C on Thu afternoon, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | |||||||||||||||
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 | SE 9 | E 9 | SE 3 | E 10 | E 9 | E 9 | SE 9 | N 4 | E 9 | E 14 | E 14 | E 13 | E 13 | E 13 | E 13 | N 4 | E 12 | N 4 | N 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 3 | 1 | 1 | 4 | 4 | 3 | 4 | 3 | 3 | 8 | 3 | 2 | 13 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-on | cross-off | off | off | cross | off | glassy | cross-on | cross-off | off | cross-off | off | off | cross-off | cross-off | cross-off | cross-on | cross-off |
High Tide | 8:30AM2.55m | 8:47PM3.14m | 9:35AM2.65m | 9:50PM3.23m | 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 | |||||||
Low Tide | 2:25PM0.27m | 3:21AM-0.05m | 3:30PM0.19m | 4:21AM-0.16m | 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 | ||||||||
 | |  | |  | | | | | | |  |  |  | | | | | | | | |
 | 5:43 | — | — | 5:45 | — | — | 5:46 | — | — | 5:47 | — | — | 5:48 | — | — | 5:48 | — | — | 5:50 | — | — |
 | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:49 | — | — | 7:47 | — | — | 7:45 | — | — | 7:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 1 | — | — | — | — | — | — | — |
Temp °C | 30 | 33 | 29 | 27 | 31 | 26 | 27 | 30 | 27 | 26 | 27 | 24 | 27 | 28 | 23 | 21 | 25 | 23 | 22 | 24 | 22 |
Feels °C | 29 | 31 | 27 | 27 | 31 | 26 | 28 | 28 | 24 | 26 | 25 | 22 | 27 | 23 | 19 | 15 | 20 | 20 | 18 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | — | SE 4 | E 9 | E 7 | E 8 | N 4 | E 8 | E 8 | SE 4 | SE 5 | SE 10 | E 10 | E 10 | E 9 | E 9 | N 4 | NNE 4 |
| kJ | 1 | 1 | 1 | 1 | — | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 4 | 2 | 2 | 2 | 2 | 2 | 7 |
Swell 2 Height (m) Direction Period (s) | SE 7 | SE 7 | SE 9 | E 9 | E 8 | E 8 | E 8 | E 9 | SE 9 | E 8 | E 9 | E 11 | E 10 | E 10 | — | E 13 | — | — | E 12 | E 9 | SE 9 |
| kJ | 2 | 2 | 3 | 2 | 1 | 1 | 1 | 2 | 3 | 1 | 1 | 2 | 2 | 2 | — | 3 | — | — | 3 | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | E 9 | E 9 | SE 9 | — | E 10 | E 10 | — | — | — | E 8 | — | E 14 | E 14 | E 13 | E 13 | S 5 | E 13 | — | — | — | — |
| kJ | 2 | 2 | 3 | — | 2 | 2 | — | — | — | 1 | — | 4 | 4 | 3 | 3 | 1 | 3 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SE 3 | — | WNW 2 | — | N 3 | — | — | S 2 | — | WNW 3 | — | NW 3 | — | N 4 | NNW 4 | — | N 4 |
| kJ | — | — | — | — | 2 | — | 1 | — | 2 | — | — | 1 | — | 2 | — | 1 | — | 8 | 10 | — | 13 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 160 | 340 | 181 | 655 | 351 | 131 | 160 | 181 | 181 | 1169 | 2671 | 108 | 1235 | 1559 | 523 | 581 | 890 | 986 | 181 | 117 | 117 |
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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