Surf Forecasts:
Nantasket Beach surf forecast from 19 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 5PM (local time) - 3.5ft (1.1m), 6s period, E swell with 80 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 1.1m 6s and forecast to arrive on Saturday (Aug 22) at 5PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Wednesday (Aug 26) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sat 22nd Aug) | 3.5ft (1.1m) 6s |
Table - best surf conditions forecast for Nantasket Beach over the next 16 days.
The Lowdown
G’day, Rusty here. I’ll be straight with you – this is a grim stretch for Nantasket Beach. Over the next 16 days, there’s nothing even close to a proper surf session. The forecast is a long, flat, and messy run with no real standouts to get excited about.
We start off Wednesday the 19th clean but tiny, with swell a mere 1ft from the ESE and a weak 6-second period. The combined energy is a measly 15, so it’s basically a lake. Thursday the 20th morning brings glassy conditions with a 1ft swell from the ESE, period 8 seconds, and energy just 12 – still barely a ripple. The pattern continues: Friday the 21st through Sunday the 23rd sees a bit more size, up to 2ft, but the wind swings onshore or cross-on, and the period drops to 5 seconds, making it choppy and weak. The first week is a total washout.
Into the second week, Monday the 24th and Tuesday the 25th stay flat with 0.7ft swells and long periods around 11-12 seconds, but the energy is pathetic – 20 or less. Wednesday the 26th is even worse, with 0.3ft and strong cross-onshore winds. There’s a tiny spike on Thursday the 27th with 5ft to 5ft swell from the ENE, period 6 seconds, and energy jumping to 127 and then 311, but the wind is cross-shore and messy, and the surf quality is still rated as poor. The period is too short to hold shape, and it’s more of a choppy mess than anything rideable.
From Friday the 28th onward, it’s back to small, weak surf – 1ft to 3ft – with periods all over the place. The water temperature is 68°F, which is about 1° cooler than average for this time of year. Nothing special there.
Honestly, this is a blank run. Nantasket Beach is a consistent spot, so it’s a bit unusual to see such a long stretch of poor surf, but it happens. The forecast can change, but for now, I’d leave the boards at home. The only hint of energy is that Thursday the 27th pulse, but it’s not worth a paddle. When the swell is that short and the wind is that messy, kite surfing might be more interesting than trying to catch a wave.
Rusty.
Short Range ForecastMostly dry. Warm (max 30°C on Wed afternoon, min 19°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 44mm), heaviest during Sat afternoon. Warm (max 26°C on Mon afternoon, min 15°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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 6 | ESE 6 | SE 6 | ESE 8 | ESE 7 | ESE 8 | E 8 | ESE 8 | ESE 8 | E 4 | E 6 | ENE 6 | ENE 5 | E 6 | E 12 | E 12 | E 11 | E 11 | E 11 | E 11 | E 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 8 | 8 | 9 | 12 | 18 | 19 | 22 | 22 | 20 | 17 | 80 | 43 | 20 | 15 | 11 | 11 | 10 | 9 | 9 | 9 | 9 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-off | glassy | cross-off | cross-off | cross-on | on | glassy | on | on | cross | glassy | cross | off | cross-off | off | cross-off | glassy | cross-on | cross-off |
High Tide | 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 | 10:18AM2.43m | 10:23PM2.82m | ||||||||
Low Tide | 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 | 4:08PM0.50m | 4:47AM0.23m | |||||||
 | |  |  |  | | | |  |  | |  | | | | | | | | | | |
 | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — |
 | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:30 | — | — | 7:29 | — |
mm | — | — | — | — | — | — | — | — | — | 11 | 31 | 2 | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 30 | 27 | 27 | 28 | 26 | 21 | 22 | 21 | 19 | 18 | 18 | 17 | 25 | 22 | 23 | 26 | 24 | 20 | 23 | 21 |
Feels °C | 28 | 29 | 26 | 27 | 27 | 25 | 19 | 20 | 19 | 19 | 16 | 16 | 18 | 25 | 22 | 22 | 23 | 22 | 18 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | ESE 6 | ESE 6 | SE 6 | ESE 8 | ESE 7 | ESE 8 | E 8 | ESE 8 | ESE 8 | E 8 | E 6 | ENE 6 | ENE 5 | E 6 | E 5 | ESE 6 | E 6 | E 6 | NNE 4 | ENE 4 | ESE 6 |
| kJ | 8 | 8 | 9 | 12 | 18 | 19 | 22 | 22 | 20 | 10 | 80 | 43 | 20 | 15 | 4 | 7 | 7 | 7 | 2 | 1 | 3 |
Swell 2 Height (m) Direction Period (s) | ESE 8 | E 8 | E 8 | — | — | E 9 | E 15 | E 14 | ENE 4 | E 13 | E 13 | E 13 | E 12 | ESE 7 | ESE 6 | E 12 | E 11 | E 11 | E 6 | E 6 | E 11 |
| kJ | 7 | 6 | 5 | — | — | 2 | 4 | 4 | 3 | 3 | 3 | 3 | 12 | 5 | 8 | 11 | 10 | 9 | 3 | 3 | 9 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | E 14 | — | — | — | ESE 7 | E 12 | E 12 | SE 6 | — | — | E 11 | E 11 | SE 6 |
| kJ | — | — | — | — | — | — | — | — | 4 | — | — | — | 5 | 11 | 11 | 1 | — | — | 9 | 9 | 2 |
Wind waves Height (m) Direction Period (s) | — | SSE 4 | WSW 2 | — | — | — | NE 3 | NE 4 | E 4 | E 4 | — | — | — | — | — | — | — | N 3 | — | SE 6 | SW 3 |
| kJ | — | 5 | 1 | — | — | — | 3 | 7 | 4 | 17 | — | — | — | — | — | — | — | 1 | — | 6 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 58 | 58 | 58 | 108 | 58 | 85 | 523 | 2735 | 55 | 117 | 98 | 28 | 12 | 560 | 58 | 58 | 58 | 58 | 213 | 805 | 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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