Surf Forecasts:
Coastguard Beach surf forecast from 18 Aug 2026:
- Most powerful swell: Saturday 22 Aug, 5PM (local time) - 1.5ft (0.5m), 13s period, E swell with 87 kJ wave energy.
Best Forecast Surf Conditions for Coastguard Beach this week:
The most powerful waves expected at Coastguard Beach in the next 16 days are 0.5m 13s and forecast to arrive on Saturday (Aug 22) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 4s period and expected on Monday (Aug 24) at 11AM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5PM (Sat 22nd Aug) | 1.5ft (0.5m) 13s |
Table - best surf conditions forecast for Coastguard Beach over the next 16 days.
The Lowdown
Alright, mate, let’s cut through the noise. The next 16 days at Coastguard Beach are mostly a flat, frustrating stretch. The water temperature is about 71°F, which is a touch warmer than usual, but that’s about the only good news.
The first week or so, from Tuesday the 18th onward, is a total bust. Swell is tiny, barely 1 to 2 feet, and the energy is weak, with readings mostly between 12 and 60 (weak energy). The periods are short, 4 to 8 seconds – just bumpy, wind-driven slop. There’s a solid 10-day gap where you won’t find a single decent wave. The winds are all over the place, but it doesn’t matter because there’s nothing to ride.
It starts to show a little life around Sunday the 30th. The swell picks up to 4 feet from the NNE, with energy hitting 97 (weak-to-moderate). The wind is cross at 15 km/h (9 mph), so it’s not clean, but it’s a step up.
Your best shot, and the only real standout, is the morning of Monday the 31st of August. The swell is 4 feet from the NE, with a 6-second period. The energy is 156 (moderate). The wind is light, only 5 km/h (3 mph) from the north, making for a light cross-shore. That’s the cleanest the surf will be all period. The crowd is "sometimes" a factor, so you might get a few waves to yourself. It’s small, but it’s rideable.
Then, on Tuesday the 1st of September, the energy jumps massively to 512 (strong wave energy) with a 4-foot NE swell and a long 14-second period. That’s real groundswell potential. But the wind is a cross-onshore at 25 km/h (15 mph), which will ruin it. For a beach break, that long period will likely make the waves close out straight. This is a promising but uncertain long-range call. It’s an expert-only zone if it gets bigger, but the wind is a mess.
So, the only real recommendation is the morning of the 31st of August. It’s small but clean. Everything else is either flat or blown out. If you’re a kite surfer, the 1st of September might be worth a look, but for paddle surfing, it’s a tough stretch.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Wed afternoon, min 20°C on Thu afternoon). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Sat night. Warm (max 25°C on Mon morning, min 16°C on Sat night). Winds increasing (light winds from the SSE on Fri night, fresh winds from the ENE by Sat night). | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | SE 8 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | ESE 7 | NNE 4 | ESE 8 | E 8 | E 8 | E 13 | ESE 4 | E 12 | SSE 5 | SSE 6 | ESE 7 | SE 6 | SE 6 |
Wave Graph  | ||||||||||||||||||||
 kJ | 29 | 18 | 16 | 8 | 7 | 17 | 17 | 10 | 24 | 13 | 11 | 10 | 87 | 18 | 11 | 37 | 27 | 18 | 25 | 14 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | on | cross | cross-on | cross-on | on | cross-on | cross | cross-on | cross | cross | cross-off |
High Tide | 4:19PM2.78m | 4:52AM2.46m | 5:08PM2.66m | 5:47AM2.31m | 6:01PM2.56m | 6:46AM2.21m | 6:57PM2.51m | 7:46AM2.18m | 7:54PM2.50m | 8:43AM2.20m | 8:48PM2.55m | 9:33AM2.27m | 9:38PM2.62m | |||||||
Low Tide | 10:42PM0.56m | 10:51AM0.79m | 11:37PM0.68m | 11:42AM0.93m | 00:34AM0.76m | 12:38PM1.01m | 1:34AM0.80m | 1:35PM1.04m | 2:31AM0.78m | 2:31PM1.02m | 3:22AM0.72m | 3:23PM0.95m | 4:08AM0.64m | |||||||
 |  |  | | | | |  | | | | |  |  | | | |  |  |  | |
 | — | — | 5:50 | — | — | 5:52 | — | — | 5:52 | — | — | 5:54 | — | — | 5:54 | — | — | 5:56 | — | — |
 | 7:36 | — | — | 7:34 | — | — | 7:32 | — | — | 7:30 | — | — | 7:30 | — | — | 7:28 | — | — | 7:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | — | — | 2 | 1 | 2 | 1 |
Temp °C | 21 | 22 | 24 | 25 | 24 | 24 | 21 | 22 | 20 | 20 | 21 | 20 | 20 | 20 | 19 | 19 | 21 | 25 | 23 | 23 |
Feels °C | 22 | 24 | 25 | 24 | 24 | 25 | 18 | 21 | 17 | 18 | 19 | 17 | 16 | 17 | 20 | 19 | 22 | 25 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | SE 8 | ESE 7 | ESE 6 | ESE 6 | ESE 6 | ESE 7 | ESE 7 | ESE 7 | ESE 8 | ESE 8 | E 8 | E 8 | E 13 | ESE 12 | ENE 4 | SSE 5 | E 12 | ESE 7 | SE 6 | SE 6 |
| kJ | 29 | 18 | 16 | 8 | 7 | 17 | 17 | 10 | 14 | 13 | 11 | 10 | 13 | 15 | 3 | 10 | 11 | 18 | 25 | 14 |
Swell 2 Height (m) Direction Period (s) | ENE 4 | ESE 8 | SSW 3 | E 8 | ESE 8 | S 6 | — | E 9 | E 6 | E 14 | NE 4 | E 13 | ESE 13 | E 13 | E 7 | ENE 4 | E 7 | E 12 | SW 4 | SSW 4 |
| kJ | 3 | 7 | 1 | 6 | 6 | 2 | — | 2 | 1 | 4 | 2 | 3 | 17 | 13 | 4 | 2 | 4 | 11 | 4 | 2 |
Swell 3 Height (m) Direction Period (s) | — | ENE 4 | ESE 8 | — | — | SE 9 | SSW 3 | E 15 | E 15 | E 14 | E 14 | — | SE 9 | SE 8 | E 12 | E 12 | N 4 | — | N 3 | E 11 |
| kJ | — | 1 | 7 | — | — | 3 | 1 | 4 | 4 | 4 | 4 | — | 3 | 3 | 11 | 11 | 1 | — | 1 | 2 |
Wind waves Height (m) Direction Period (s) | NE 4 | — | SW 6 | SSW 4 | SSW 3 | SSW 3 | NNW 2 | — | NNE 4 | NNE 4 | — | — | E 13 | ESE 4 | SE 6 | SSE 5 | SSE 6 | SSW 4 | — | N 3 |
| kJ | 5 | — | 10 | 10 | 4 | 1 | 2 | — | 24 | 11 | — | — | 87 | 18 | 8 | 37 | 27 | 13 | — | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 66 | 11 | 10 | 132 | 11 | 132 | 17 | 167 | 167 | 2417 | 132 | 808 | 808 | 297 | 1460 | 808 | 139 | 139 | 69 | 11 |
Best forecast wave conditions in Massachusetts | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Coastguard Beach Surf forecast
The above surf forecast table for Coastguard Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Coastguard Beach can be found by selecting the local surf guide option on the grey menu. Our Coastguard 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 (Coastguard 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 Coastguard 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.
Coastguard Beach is 14 km (9 miles) from Brewster. If you plan a vacation in Massachusetts, look for hotels and other accommodation in Brewster. Brewster has rooms for a wide range of budgets as well as car hire and transport links.
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