Surf Forecasts:
Ersary beach (Barra) surf forecast from 17 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 1AM (local time) - 10ft (3.0m), 11s period, WSW swell with cross-shore winds.
- Most powerful swell: Wednesday 19 Aug, 1AM (local time) - 10ft (3.0m), 11s period, WSW swell with 1,998 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 10AM (local time) - 3ft (0.9m), 9s period with WSW swell.
Best Forecast Surf Conditions for Ersary beach (Barra) this week:
The surf forecast for Ersary beach (Barra) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 17) at 10AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.3m and 6s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ersary beach (Barra) in the next 16 days are 3.0m 11s and forecast to arrive on Wednesday (Aug 19) at 1AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 5s period and expected on Monday (Aug 17) at 10PM.
| Wave Type | Time (BST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Mon 17th Aug) | 3ft (0.9m) 9s |
| Best Surf | 1AM (Wed 19th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 1AM (Wed 19th Aug) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Ersary beach (Barra) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at what’s coming our way for Ersary Beach on Barra.
Right now, things are flat and pretty ordinary. The forecast opens with very weak, sloppy surf on Monday the 17th, with waves around 3 ft from the west-southwest but a light breeze keeping it clean in the morning (combined energy 139). That afternoon it gets worse, dropping to 2 ft with a lumpy cross-offshore wind, so honestly, nothing to get excited about. We’ve got a few days of poor conditions here, with building swell but nasty winds through Tuesday and Wednesday morning.
The real standout, the one you want to circle, is Wednesday morning the 19th of August. There’s a solid 8 ft swell from the west-southwest, with a long period of 11 seconds, so that’s proper groundswell energy (combined energy 1316). The wind swings around to a light easterly, making it a clean cross-offshore breeze. This is a beach break, so that longer period could make it a bit straight, but for experienced surfers it’s excellent. The water temperature is about average for the time of year. However, at 8 ft this is getting into expert territory – beginners should sit this one out.
After that, the wind goes nasty again, and we see a big gap with nothing but poor surf and strong onshore winds through until the end of the month. Sunday the 30th tries to lift, with a 10 ft west-southwest swell (combined energy 2338) but the cross-onshore breeze messes it up, and the swell is just too big for this break anyway.
The final note is Monday the 31st of August, which offers a massive 13 ft swell with a very long 14-second period (combined energy 9399). With a clean cross-offshore breeze from the south-southeast, conditions look beautiful, but that is way too big for Ersary Beach. Only for the most experienced crew on the right gear, and even then, it might be a washing machine.
So, to sum up: Wednesday morning the 19th is your best bet for clean, powerful waves. After that, the wind and swell size work against us for a long stretch. Keep an eye on the charts, but for now, I’d be planning for that Wednesday session.
Rusty.
Short Range ForecastHeavy rain (total 21mm), heaviest during Mon afternoon. Very mild (max 15°C on Mon night, min 13°C on Tue night). Winds increasing (light winds from the SE on Sun night, strong winds from the NNE by Wed afternoon). | Days 4-6 Weather SummarySome drizzle, heaviest during Fri night. Very mild (max 13°C on Wed night, min 11°C on Thu night). Winds decreasing (strong winds from the NNE on Wed night, light winds from the W by Fri night). | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | WSW 9 | SW 8 | SW 6 | WSW 7 | WSW 9 | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | N 5 | N 5 | NNW 5 | NNW 5 | NW 5 | WSW 10 | WNW 6 | W 6 | W 6 | W 7 | W 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 129 | 69 | 112 | 343 | 764 | 1998 | 1316 | 745 | 258 | 94 | 61 | 44 | 30 | 42 | 14 | 21 | 51 | 112 | 135 | 195 | 181 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-on | cross-on | cross-on | cross | cross-off | cross-off | cross | cross | cross | cross | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on |
High Tide | 9:51AM3.22m | 10:12PM3.20m | 10:28AM3.01m | 10:50PM2.92m | 11:08AM2.79m | 11:33PM2.64m | 11:57AM2.56m | 00:28AM2.39m | 1:05PM2.38m | 1:51AM2.25m | 2:43PM2.33m | 3:33AM2.28m | 4:12PM2.45m | ||||||||
Low Tide | 3:53PM0.30m | 4:15AM0.50m | 4:32PM0.57m | 4:53AM0.77m | 5:15PM0.87m | 5:37AM1.04m | 6:09PM1.15m | 6:39AM1.27m | 7:33PM1.34m | 8:14AM1.37m | 9:16PM1.34m | 9:47AM1.27m | 10:30PM1.17m | ||||||||
 |  |  |  | | | |  |  | |  | | | |  | | | | | | | |
 | 5:58 | — | — | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | — | 9:06 | — | — | 9:04 | — | — | 9:00 | — | 8:59 | — | — | 8:55 | — | — | 8:53 | — | — | 8:51 | — |
mm | — | 11 | 1 | 1 | 2 | 5 | 1 | — | — | — | — | — | — | — | 1 | — | — | 4 | — | 1 | 3 |
Temp °C | 14 | 14 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
Feels °C | 12 | 10 | 10 | 8 | 8 | 9 | 13 | 9 | 4 | 4 | 4 | 5 | 6 | 9 | 9 | 9 | 8 | 7 | 7 | 7 | 8 |
Swell 1 Height (m) Direction Period (s) | WSW 9 | SW 8 | — | — | — | WSW 11 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | W 9 | W 9 | SW 8 | WSW 8 | NW 5 | WSW 10 | SW 10 | SW 15 | WSW 10 | SSW 15 | SSW 14 |
| kJ | 129 | 69 | — | — | — | 1998 | 1316 | 745 | 258 | 94 | 61 | 39 | 18 | 14 | 10 | 21 | 25 | 8 | 9 | 21 | 19 |
Swell 2 Height (m) Direction Period (s) | NW 6 | WNW 6 | SW 18 | — | — | — | — | — | — | SW 16 | SW 15 | SW 14 | W 8 | W 8 | WSW 8 | WSW 8 | SW 13 | SW 15 | SSW 15 | — | — |
| kJ | 6 | 3 | 12 | — | — | — | — | — | — | 10 | 9 | 8 | 12 | 4 | 14 | 6 | 7 | 8 | 21 | — | — |
Swell 3 Height (m) Direction Period (s) | N 7 | N 7 | — | — | — | — | — | — | — | — | — | N 10 | SW 14 | SW 14 | W 7 | SW 13 | SW 16 | — | S 12 | — | — |
| kJ | 4 | 1 | — | — | — | — | — | — | — | — | — | 2 | 8 | 7 | 4 | 7 | 10 | — | 3 | — | — |
Wind waves Height (m) Direction Period (s) | — | S 3 | SW 6 | WSW 7 | WSW 9 | WSW 11 | — | ENE 3 | NNE 5 | N 5 | N 5 | N 5 | NNW 5 | NNW 5 | NNE 3 | NW 4 | WNW 6 | W 6 | W 6 | W 7 | W 7 |
| kJ | — | 5 | 112 | 343 | 764 | 1369 | — | 4 | 143 | 81 | 50 | 44 | 30 | 42 | 1 | 15 | 51 | 112 | 135 | 195 | 181 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 67 | 130 | 149 | 235 | 135 | 0 | 66 | 166 | 166 | 796 | 295 | 148 | 304 | 235 | 323 | 323 | 340 | 432 | 172 | 194 |
Best forecast wave conditions in Outer Hebrides | |||||||||||||||||||||
Best forecast wave conditions in United Kingdom | |||||||||||||||||||||
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Information about the Ersary beach (Barra) Surf forecast
The above surf forecast table for Ersary beach (Barra) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ersary beach (Barra) can be found by selecting the local surf guide option on the grey menu. Our Ersary beach (Barra) 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 (Ersary beach (Barra)) 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 Ersary beach (Barra) 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.
Are you planning a holiday in Outer Hebrides? If you are looking for accommodation near Ersary beach (Barra), camping, hotels and holiday cottages in Outer Hebrides, consider staying in Tiree which is 69 km (43 miles) away. Other places in and around Outer Hebrides where you can find information about places to rent, and car hire include Portree which is 86 km (53 miles) away and Mallaig, 99 km (61 miles) away.
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