Surf Forecasts:
Long Sands surf forecast from 18 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 11PM (local time) - 2.5ft (0.8m), 8s period, SE swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 8PM (local time) - 3ft (0.9m), 9s period, SE swell with 126 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 11PM (local time) - 2.5ft (0.8m), 8s period with SE swell.
Best Forecast Surf Conditions for Long Sands this week:
The surf forecast for Long Sands over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 11PM. The primary swell is predicted to be 0.8m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Long Sands in the next 16 days are 0.9m 9s and forecast to arrive on Tuesday (Aug 18) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Aug 23) at 8AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 18th Aug) | 2.5ft (0.8m) 8s |
| Best Surf | 11PM (Tue 18th Aug) | 2.5ft (0.8m) 8s |
| Most Powerful | 8PM (Tue 18th Aug) | 3ft (0.9m) 9s |
Table - best surf conditions forecast for Long Sands over the next 16 days.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 25°C on Wed afternoon, min 19°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 17mm), heaviest on Sun morning. Warm (max 22°C on Fri afternoon, min 16°C on Sun morning). Wind will be generally light. | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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) | SE 9 | SE 5 | SE 9 | SE 8 | SE 7 | SE 7 | SE 6 | SE 8 | ESE 7 | SE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 5 | ESE 6 | E 6 | E 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 13 | 12 | 64 | 86 | 50 | 55 | 41 | 48 | 37 | 35 | 38 | 26 | 37 | 35 | 22 | 30 | 43 | 41 | 28 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-on | glassy | cross-on | cross-on | off | cross | cross-on | off | cross-on | on | glassy | cross-on | on | cross-on | cross | cross-off | cross |
High Tide | 3:48AM2.64m | 4:09PM2.76m | 4:42AM2.47m | 5:00PM2.67m | 5:38AM2.33m | 5:53PM2.58m | 6:36AM2.23m | 6:49PM2.53m | 7:38AM2.19m | 7:49PM2.53m | 8:37AM2.20m | 8:46PM2.58m | |||||||
Low Tide | 9:42PM0.09m | 9:57AM0.23m | 10:36PM0.21m | 10:46AM0.40m | 11:31PM0.32m | 11:38AM0.54m | 00:29AM0.41m | 12:33PM0.63m | 1:31AM0.45m | 1:33PM0.67m | 2:33AM0.43m | 2:32PM0.65m | 3:25AM0.36m | ||||||
 |  |  |  | | | |  | |  | | | | | | |  | | | |
 | — | 5:50 | — | — | 5:50 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — |
 | 7:42 | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | — | 7:32 | — |
mm | — | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — | — | — | 14 | 2 | — |
Temp °C | 20 | 21 | 21 | 20 | 22 | 25 | 24 | 19 | 20 | 19 | 19 | 22 | 20 | 20 | 20 | 19 | 16 | 17 | 18 |
Feels °C | 20 | 22 | 22 | 22 | 23 | 26 | 25 | 19 | 20 | 20 | 19 | 22 | 20 | 19 | 19 | 20 | 14 | 16 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 4 | SE 5 | SE 9 | SE 8 | SE 7 | SE 9 | SE 6 | SE 8 | ESE 7 | SE 8 | ESE 8 | E 5 | ESE 8 | ESE 8 | ESE 8 | ESE 5 | ESE 6 | ESE 12 | E 6 |
| kJ | 4 | 12 | 64 | 86 | 50 | 19 | 41 | 48 | 37 | 35 | 38 | 16 | 37 | 35 | 22 | 30 | 43 | 14 | 28 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 8 | ESE 5 | SE 9 | SE 9 | SE 9 | SE 8 | — | — | E 7 | SE 15 | ESE 8 | E 4 | ESE 13 | ESE 13 | ESE 7 | ESE 12 | SE 9 | ESE 12 |
| kJ | 13 | 11 | 8 | 22 | 21 | 21 | 18 | — | — | 10 | 8 | 26 | 3 | 17 | 17 | 10 | 15 | 3 | 14 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 5 | — | — | — | — | — | E 16 | E 15 | E 15 | SE 14 | ESE 14 | SE 13 | SE 9 | ESE 13 | SE 9 | ESE 8 | SE 8 |
| kJ | — | — | 4 | — | — | — | — | — | 5 | 4 | 4 | 8 | 18 | 7 | 3 | 16 | 3 | 7 | 3 |
Wind waves Height (m) Direction Period (s) | — | E 4 | — | — | — | SE 7 | — | — | — | — | E 3 | — | — | — | ESE 5 | — | NE 3 | E 6 | — |
| kJ | — | 5 | — | — | — | 55 | — | — | — | — | 6 | — | — | — | 12 | — | 6 | 41 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 212 | 195 | 209 | 11 | 40 | 30 | 11 | 259 | 2542 | 11 | 468 | 506 | 27 | 484 | 636 | 456 | 115 | 11 | 11 |
Best forecast wave conditions in Maine | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Long Sands surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Long Sands Surf forecast
The above surf forecast table for Long Sands provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Long Sands can be found by selecting the local surf guide option on the grey menu. Our Long Sands 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 (Long Sands) 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 Long Sands 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.
Long Sands is 15 km (9 miles) from Portsmouth. If you plan a vacation in Maine, look for hotels and other accommodation in Portsmouth. Portsmouth has rooms for a wide range of budgets as well as car hire and transport links.
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