Surf Forecasts:
Nahant Beach surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 8AM (local time) - 2ft (0.6m), 8s period, ESE swell with offshore winds.
- Most powerful swell: Thursday 20 Aug, 5AM (local time) - 2ft (0.6m), 8s period, ESE swell with 43 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 8AM (local time) - 2ft (0.6m), 8s period with ESE swell.
Best Forecast Surf Conditions for Nahant Beach this week:
The surf forecast for Nahant Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 8AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.3m and 8s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Nahant Beach in the next 16 days are 0.6m 8s and forecast to arrive on Thursday (Aug 20) 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 0.2m 2s period and expected on Thursday (Aug 20) at 2AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Thu 20th Aug) | 2ft (0.6m) 8s |
| Best Surf | 8AM (Thu 20th Aug) | 2ft (0.6m) 8s |
| Most Powerful | 5AM (Thu 20th Aug) | 2ft (0.6m) 8s |
Table - best surf conditions forecast for Nahant Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get into it for Nahant Beach. I gotta be straight with you—this is a tough stretch. We’re looking at a 16-day window, but the first nine days are a write-off. From Tuesday the 18th of August right through to Wednesday the 26th, it’s just no good. Tiny waves, weak energy, and mostly onshore or cross-onshore wind. You’re looking at 0.7 ft to 2 ft of swell, with the combined energy sitting between 8 and 42—that’s basically flat. The water temp is 67°, which is about 2° cooler than average for this time of year, so nothing too wild.
The real story picks up Thursday the 27th of August. We get a jump to 3 ft from the ESE, but it’s a short period of 5 seconds. The energy bumps up to 81, but it’s still classed as poor. The wind is cross-offshore from the SW at 9 mph, so it’s clean, but that wave quality is just ordinary. By Thursday afternoon, the combined energy hits 113 (moderate) with a 1 ft SE swell at 12 seconds. That longer period suggests better shape, but the size is small.
The standout period is Sunday the 30th of August through Monday the 31st of August. On Sunday morning, we see 3 ft from the NE with a 5-second period and 81 energy, but it’s cross-shore wind at 12 mph, so it’s messy. However, Sunday afternoon improves: 4 ft from the NE, 6-second period, and energy of 104. The wind is light cross-onshore from the SE at 3 mph, making it glassy. Then Monday morning the 31st of August is the best of the whole run. We’ve got 4 ft from the NE, 6-second period, and the energy is up to 121. The wind is glassy—zero from the ESE. That’s clean, surfable, and the biggest we’ve seen. The crowd situation at Nahant Beach is “often” busy, so expect company.
After that, Tuesday the 1st of September drops back to 1 ft from the ESE with a 14-second period, but onshore winds ruin it. The rest of the window fades out with small, weak waves. Overall, for Nahant Beach, your best bet is the morning of Monday the 31st of August. It’s not a classic, but it’s the only time the waves are worth a paddle. Don’t get your hopes up for the rest.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu afternoon. Warm (max 30°C on Wed afternoon, min 17°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Sun night. Warm (max 22°C on Fri afternoon, min 16°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 | SE 9 | SE 7 | ESE 7 | ESE 6 | SE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 5 | E 5 | E 5 | ESE 12 | ESE 12 | ESE 11 | SE 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 3 | 19 | 25 | 17 | 23 | 18 | 23 | 22 | 32 | 21 | 22 | 21 | 20 | 19 | 20 | 15 | 14 | 14 | 13 | 12 | 12 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-off | off | cross-off | cross-off | glassy | off | cross-on | on | cross | on | cross-on | cross | cross | glassy | on | off | cross-off | cross-off |
High Tide | 4:15PM2.86m | 4:46AM2.55m | 5:05PM2.75m | 5:41AM2.40m | 5:58PM2.66m | 6:40AM2.29m | 6:54PM2.61m | 7:40AM2.24m | 7:52PM2.60m | 8:39AM2.26m | 8:48PM2.64m | 9:32AM2.32m | 9:40PM2.72m | ||||||||
Low Tide | 9:57AM0.22m | 10:32PM0.21m | 10:45AM0.40m | 11:26PM0.34m | 11:37AM0.54m | 00:24AM0.43m | 12:32PM0.64m | 1:24AM0.48m | 1:29PM0.68m | 2:24AM0.46m | 2:26PM0.66m | 3:18AM0.41m | 3:19PM0.58m | 4:05AM0.32m | |||||||
 | |  |  | | |  |  |  | | | | | | | | |  | | | | |
 | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — |
 | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:30 | — |
mm | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | 6 | 2 | — | — |
Temp °C | 22 | 23 | 21 | 27 | 30 | 28 | 23 | 23 | 23 | 21 | 22 | 20 | 20 | 21 | 18 | 17 | 20 | 19 | 23 | 27 | 24 |
Feels °C | 23 | 23 | 23 | 27 | 29 | 28 | 23 | 25 | 23 | 18 | 19 | 19 | 19 | 19 | 17 | 17 | 22 | 21 | 21 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | ESE 4 | SE 9 | SE 7 | ESE 7 | ESE 6 | SE 6 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | E 5 | ESE 7 | ESE 7 | E 4 | ESE 6 | ESE 6 | SE 6 |
| kJ | 3 | 19 | 25 | 17 | 23 | 18 | 23 | 22 | 32 | 21 | 22 | 21 | 20 | 19 | 20 | 10 | 9 | 6 | 8 | 4 | 10 |
Swell 2 Height (m) Direction Period (s) | SSE 5 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | — | — | E 15 | E 15 | E 14 | ENE 4 | E 13 | E 13 | ESE 7 | ESE 12 | ESE 12 | ESE 7 | ESE 12 | ESE 11 | ESE 11 |
| kJ | 2 | 16 | 8 | 7 | 7 | 13 | — | — | 4 | 4 | 4 | 3 | 14 | 13 | 18 | 15 | 14 | 9 | 13 | 12 | 12 |
Swell 3 Height (m) Direction Period (s) | SE 8 | — | — | — | — | — | — | — | — | — | E 14 | E 14 | — | — | E 13 | — | E 9 | ESE 12 | ENE 4 | SE 7 | ESE 6 |
| kJ | 3 | — | — | — | — | — | — | — | — | — | 4 | 4 | — | — | 13 | — | 1 | 14 | 2 | 2 | 7 |
Wind waves Height (m) Direction Period (s) | — | ESE 4 | — | — | SE 3 | WSW 2 | — | — | — | NE 4 | ENE 5 | — | NE 3 | ENE 3 | — | E 5 | E 5 | — | — | — | — |
| kJ | — | 3 | — | — | 2 | 1 | — | — | — | 17 | 12 | — | 2 | 4 | — | 12 | 11 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 108 | 123 | 43 | 47 | 47 | 43 | 47 | 47 | 47 | 520 | 221 | 56 | 568 | 814 | 97 | 56 | 28 | 47 | 47 | 56 | 56 |
Best forecast wave conditions in Massachusetts | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Nahant Beach Surf forecast
The above surf forecast table for Nahant Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nahant Beach can be found by selecting the local surf guide option on the grey menu. Our Nahant 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 (Nahant 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 Nahant 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.
Nahant Beach is 7 km (4 miles) from Lynn. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Lynn. Lynn has rooms for a wide range of budgets as well as car hire and transport links.
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