
Surf Forecasts:
Back Strands surf forecast from 14 Sep 2026:
- Best quality surf: Sunday 20 Sep, 1PM (local time) - 10ft (3.0m), 14s period, WNW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 7PM (local time) - 13ft (4.0m), 14s period, WNW swell with 6,105 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 1PM (local time) - 10ft (3.0m), 14s period with WNW swell.
Best Forecast Surf Conditions for Back Strands this week:
The surf forecast for Back Strands over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 1PM. The primary swell is predicted to be 3.0m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Back Strands in the next 16 days are 4.0m 14s and forecast to arrive on Thursday (Sep 17) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Monday (Sep 21) at 7AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Sun 20th Sep) | 10ft (3.0m) 14s |
| Best Surf | 1PM (Sun 20th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 7PM (Thu 17th Sep) | 13ft (4.0m) 14s |
Table - best surf conditions forecast for Back Strands over the next 16 days.
The Lowdown
Right, let’s get into it. This is Rusty, and I’ve got a 16-day look at Back Strands. Honestly, the first week is a write-off. We’re looking at a lot of onshore or cross-onshore wind, lumpy, messy conditions, and waves that are mostly too weak or just plain rubbish. The swell energy is low to moderate at best, with readings in the 60-839 range early on, but the wind just ruins it. You’ll see a couple of mornings with cleaner conditions, but the swell is too small or the wind is still off. For the first seven days, there’s really nothing worth paddling out for.
Then things start to get interesting, but you have to be patient.
Monday 22nd September – This is the standout of the whole period. Tuesday morning, the 22nd, we get a big pulse of W swell, 16 ft at 13 seconds, with light ENE cross-off wind. The energy is a massive 7302 – strong, powerful stuff. This is expert territory only, very heavy, but if you’ve got the skills and the board, you’ll be in for a serious session. The afternoon goes glassy, NNE 0 mph, with a 12 ft WNW swell, still packing 3910 energy. Clean, lined-up, proper.
Thursday 24th September – Another belter. Thursday morning has a 6 ft WNW swell at a very long 16 seconds, with light SE offshore wind, giving clean conditions and 2137 energy. Excellent for experienced surfers. The afternoon pushes 8 ft W swell at 16 seconds, 3647 energy, with light cross-off wind. This is another day for the crew who know what they’re doing.
Sunday 27th September – A word of caution. The afternoon sees a 13 ft W swell return, but with a SW cross-shore wind of 9 mph. The energy is 3407 – strong – but the wind will chop it up. It’s a marginal call; only worth it if you’re desperate for a big, lumpy paddle.
Water temp is about average for this time of year, no real anomaly to report. Back Strands is a reef break, fairly exposed, and with that consistency, it can handle these swells. The crowd factor is “sometimes” busy, so you might have company on the best days, especially on the 22nd and 24th.
The long-period swells (16 seconds) mean the waves will have plenty of shape and energy, with deeper gaps between sets, making the paddle out a bit easier if you time it right.
So, the good news: there are two true standouts on the 22nd and 24th of September. Mark your calendar. The rest of the fortnight is a lot of waiting and watching. Stay loose.
Rusty
Short Range ForecastModerate rain (total 12mm), heaviest on Mon morning. Very mild (max 17°C on Mon morning, min 13°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryModerate rain (total 11mm), heaviest on Wed night. Very mild (max 16°C on Fri afternoon, min 13°C on Wed night). Winds decreasing (strong winds from the W on Thu morning, light winds from the SSW by Fri morning). | ||||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | |||||||||||||||
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) | W 8 | W 11 | W 10 | W 10 | W 9 | WNW 12 | WNW 10 | W 10 | W 9 | W 10 | WNW 13 | WNW 14 | WNW 13 | WNW 12 | W 11 | W 10 | W 10 | WNW 12 | WNW 14 | WNW 14 | WNW 13 |
Wave Graph | |||||||||||||||||||||
51 | 188 | 216 | 541 | 397 | 1230 | 659 | 377 | 487 | 1490 | 4438 | 4966 | 2440 | 1220 | 778 | 520 | 761 | 2513 | 3429 | 2844 | 1511 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross | cross-on | cross-on | on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross | off | cross-off |
High Tide | 8:20AM3.39m | 8:34PM3.49m | 8:53AM3.26m | 9:08PM3.19m | 9:26AM3.07m | 9:44PM2.87m | 10:03AM2.85m | 10:23PM2.55m | 10:49AM2.61m | 11:18PM2.28m | 12:00PM2.41m | 00:50AM2.11m | 1:47PM2.37m | 2:42AM2.15m | |||||||
Low Tide | 2:15PM0.19m | 2:37AM0.27m | 2:50PM0.39m | 3:07AM0.52m | 3:27PM0.65m | 3:40AM0.79m | 4:07PM0.93m | 4:17AM1.07m | 5:00PM1.22m | 5:11AM1.31m | 6:32PM1.42m | 6:54AM1.45m | 8:43PM1.39m | ||||||||
7:03 | — | — | 7:05 | — | — | 7:07 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | |
— | 7:53 | — | — | 7:51 | — | — | 7:49 | — | — | 7:45 | — | — | 7:44 | — | — | 7:40 | — | — | 7:38 | — | |
mm | 3 | 3 | 3 | 1 | 1 | 1 | — | — | 7 | 2 | 1 | 1 | — | — | — | — | — | — | — | 1 | 1 |
Temp °C | 17 | 17 | 15 | 14 | 14 | 13 | 13 | 15 | 14 | 13 | 13 | 13 | 13 | 16 | 15 | 14 | 14 | 13 | 12 | 11 | 17 |
Feels °C | 15 | 15 | 9 | 8 | 8 | 6 | 9 | 10 | 9 | 4 | 4 | 6 | 10 | 12 | 10 | 8 | 7 | 7 | 9 | 8 | 13 |
Swell 1 Height (m) Direction Period (s) | W 8 | W 11 | W 10 | NW 11 | NW 11 | — | WNW 10 | W 10 | — | — | — | — | WNW 13 | WNW 12 | W 11 | — | — | — | WNW 14 | WNW 14 | WNW 13 |
51 | 188 | 216 | 5 | 5 | — | 659 | 377 | — | — | — | — | 2440 | 1220 | 778 | — | — | — | 3429 | 2844 | 1511 | |
Swell 2 Height (m) Direction Period (s) | NW 13 | NW 13 | NW 12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6 | 7 | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | SSW 3 | S 3 | W 5 | W 10 | W 9 | WNW 12 | — | — | W 9 | W 10 | WNW 13 | WNW 14 | — | — | — | W 10 | W 10 | WNW 12 | — | — | — |
3 | 8 | 59 | 541 | 397 | 1230 | — | — | 487 | 1490 | 4438 | 4966 | — | — | — | 520 | 761 | 2513 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 27 | 53 | 502 | 727 | 437 | 243 | 53 | 415 | 876 | 727 | 400 | 14 | 27 | 53 | 265 | 265 | 261 | 27 | 0 | 129 |
Best forecast wave conditions in Sligo | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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Information about the Back Strands Surf forecast
The above surf forecast table for Back Strands provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Back Strands can be found by selecting the local surf guide option on the grey menu. Our Back Strands 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 (Back Strands) 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 Back Strands 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 Sligo? If you are looking for accommodation near Back Strands, camping, hotels and holiday cottages in Sligo, consider staying in Sligo which is 19 km (12 miles) away. Other places in and around Sligo where you can find information about places to rent, and car hire include Killybegs which is 21 km (13 miles) away, Enniskillen, Ballina and Letterkenny.










