Surf Forecasts:
Rossnowlagh surf forecast from 12 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 7AM (local time) - 8ft (2.5m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 1PM (local time) - 8ft (2.5m), 10s period, WNW swell with 1,368 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 1AM (local time) - 2.5ft (0.7m), 11s period with W swell.
Best Forecast Surf Conditions for Rossnowlagh this week:
The surf forecast for Rossnowlagh over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 13) at 1AM. The primary swell is predicted to be 0.7m and 11s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Rossnowlagh in the next 16 days are 2.5m 10s and forecast to arrive on Wednesday (Aug 19) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 2s period and expected on Monday (Aug 17) at 10AM.
| Wave Type | Time (IST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Thu 13th Aug) | 2.5ft (0.7m) 11s |
| Best Surf | 7AM (Wed 19th Aug) | 8ft (2.5m) 9s |
| Most Powerful | 1PM (Wed 19th Aug) | 8ft (2.5m) 10s |
Table - best surf conditions forecast for Rossnowlagh over the next 16 days.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed afternoon. Warm (max 23°C on Thu afternoon, min 13°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Sun night. Very mild (max 16°C on Sun afternoon, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 10 | WSW 10 | W 11 | W 10 | W 10 | W 9 | W 9 | W 8 | W 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | W 10 | W 8 | W 8 | W 7 | W 7 | W 7 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 33 | 119 | 100 | 71 | 83 | 76 | 49 | 66 | 110 | 83 | 74 | 52 | 28 | 17 | 49 | 20 | 17 | 15 | 183 | 754 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | cross-off | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-off | on | on | on | on | on | cross-on |
High Tide | 6:30PM3.90m | 6:56AM3.39m | 7:13PM4.06m | 7:38AM3.43m | 7:54PM4.09m | 8:18AM3.41m | 8:33PM3.97m | 8:56AM3.32m | 9:11PM3.73m | 9:33AM3.18m | 9:49PM3.41m | 10:11AM3.01m | 10:28PM3.06m | ||||||||
Low Tide | 12:04PM0.22m | 00:45AM-0.01m | 12:46PM0.07m | 1:27AM-0.11m | 1:27PM0.01m | 2:07AM-0.08m | 2:06PM0.05m | 2:44AM0.04m | 2:44PM0.19m | 3:20AM0.25m | 3:23PM0.40m | 3:55AM0.51m | 4:04PM0.67m | ||||||||
 |  |  | |  | | |  | | | | | | |  |  | |  | | |  | |
 | 6:01 | — | — | 6:03 | — | — | 6:05 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — | 6:13 | — | — |
 | — | — | 9:12 | — | — | 9:09 | — | — | 9:07 | — | — | 9:05 | — | — | 9:02 | — | — | 9:00 | — | 8:59 | — |
mm | — | 1 | — | 1 | 2 | — | — | — | — | — | — | — | — | — | 5 | 2 | — | — | — | 1 | 8 |
Temp °C | 22 | 22 | 20 | 20 | 23 | 18 | 16 | 16 | 14 | 15 | 15 | 14 | 15 | 16 | 16 | 16 | 16 | 15 | 16 | 16 | 17 |
Feels °C | 21 | 22 | 22 | 21 | 23 | 19 | 13 | 13 | 12 | 11 | 11 | 12 | 13 | 15 | 15 | 15 | 14 | 12 | 12 | 15 | 17 |
Swell 1 Height (m) Direction Period (s) | WSW 10 | WSW 10 | W 11 | W 10 | W 10 | W 9 | — | W 8 | — | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 7 | W 8 | W 8 | W 7 | W 7 | — | — |
| kJ | 33 | 33 | 119 | 100 | 71 | 83 | — | 49 | — | 110 | 83 | 74 | 52 | 28 | 8 | 49 | 20 | 17 | 15 | — | — |
Swell 2 Height (m) Direction Period (s) | N 7 | — | — | — | — | — | — | — | — | — | — | — | — | W 6 | W 10 | NW 6 | — | N 6 | — | — | — |
| kJ | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 17 | 2 | — | 1 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | W 8 | WSW 6 | N 8 | NW 6 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | 1 | 1 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | S 3 | — | — | — | — | W 9 | — | W 8 | — | — | — | — | — | — | SE 2 | — | — | SSW 3 | W 7 | W 8 |
| kJ | 2 | 1 | — | — | — | — | 76 | — | 66 | — | — | — | — | — | — | 2 | — | — | 6 | 183 | 754 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 36 | 57 | 0 | 0 | 9 | 107 | 246 | 759 | 73 | 827 | 799 | 73 | 57 | 23 | 65 | 107 | 483 | 399 | 286 | 48 | 48 |
Best forecast wave conditions in Donegal | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Rossnowlagh 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 Rossnowlagh Surf forecast
The above surf forecast table for Rossnowlagh provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rossnowlagh can be found by selecting the local surf guide option on the grey menu. Our Rossnowlagh 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 (Rossnowlagh) 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 Rossnowlagh 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.
Rossnowlagh is 17 km (11 miles) from Killybegs. If you plan a holiday in Donegal, look for hotels and other accommodation in Killybegs. Killybegs has rooms for a wide range of budgets as well as car hire and transport links.
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