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Surf Forecasts:
Rossnowlagh surfForecast / Donegal / Ireland
48hr Weather and Surf, issued 6 pm Monday 18 May 2026 ISTForecast update in hr min s Forecast update imminent
Rossnowlagh surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Rossnowlagh sea temperature is
11.3° C
(Which is normal for this time of year)How big are the waves at Rossnowlagh today?
The current surf forecast for Rossnowlagh at 1AM is: 0.7m 10s primary swell from a West-northwest direction and 0.1m 15s secondary swell from a West direction (forecast issued at 06:00pm May 18). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (IST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 1.5ft (0.4m) | 9s |
| Afternoon (19 May) | 2ft (0.6m) | 9s |
| Evening (19 May) | 3ft (0.9m) | 16s |
Table - waves today at Rossnowlagh. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 18mm), heaviest on Mon night. Very mild (max 17°C on Thu morning, min 10°C on Mon afternoon). Wind will be generally light. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
W 10 | W 10 | WNW 10 | WNW 10 | W 10 | W 9 | W 9 | W 9 | W 9 | W 16 | W 16 | W 16 | W 15 | W 14 | W 14 | W 13 | W 13 | W 12 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | |
250 | 204 | 131 | 100 | 67 | 44 | 25 | 41 | 58 | 129 | 396 | 928 | 945 | 1315 | 1052 | 861 | 640 | 485 | 400 | 327 | 206 | 149 | 149 | 112 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-off | off | cross | cross | cross | cross | |
High Tide | 7:47PM3.77m | 8:13AM3.43m | 8:36PM3.72m | 9:06AM3.19m | 9:29PM3.61m | 10:03AM2.93m | ||||||||||||||||||
Low Tide | 1:23PM0.03m | 1:55AM0.04m | 2:08PM0.18m | 2:47AM0.17m | 2:55PM0.38m | 3:45AM0.37m | ||||||||||||||||||
 |  |  | | | |  | | | |  |  |  | | | |  | | | | | | | | |
 | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — |
 | — | 9:36 | — | — | — | — | — | — | — | 9:37 | — | — | — | — | — | — | — | 9:38 | — | — | — | — | — | 9:40 |
— | 1 | 2 | 3 | 1 | — | 3 | 1 | 1 | 1 | 1 | — | — | 1 | 1 | 1 | — | — | — | — | 1 | — | — | — | |
Temp °C | 13 | 10 | 10 | 10 | 11 | 12 | 12 | 14 | 12 | 11 | 11 | 10 | 10 | 11 | 12 | 12 | 14 | 12 | 13 | 11 | 14 | 14 | 15 | 17 |
8 | 6 | 4 | 6 | 9 | 10 | 9 | 9 | 9 | 8 | 9 | 7 | 6 | 6 | 9 | 9 | 10 | 10 | 12 | 9 | 12 | 11 | 13 | 14 | |
Swell 1 Height (m) Direction Period (s) | W 10 | W 10 | WNW 10 | WNW 10 | W 10 | W 9 | W 9 | W 9 | W 9 | W 10 | W 16 | W 16 | W 15 | W 14 | W 14 | W 13 | W 13 | W 12 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 |
 kJ | 250 | 204 | 131 | 100 | 67 | 44 | 25 | 41 | 58 | 87 | 396 | 928 | 945 | 1315 | 1052 | 861 | 640 | 485 | 400 | 327 | 206 | 149 | 149 | 112 |
Swell 2 Height (m) Direction Period (s) | — | — | W 16 | W 15 | W 15 | W 15 | WNW 9 | W 13 | W 13 | W 16 | W 10 | — | — | — | — | — | — | — | — | — | NW 6 | WNW 6 | NW 6 | NW 7 |
| kJ | — | — | 5 | 5 | 4 | 17 | 17 | 14 | 31 | 129 | 66 | — | — | — | — | — | — | — | — | — | 1 | 3 | 6 | 8 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 14 | W 18 | W 17 | W 13 | — | — | — | — | — | — | — | — | — | — | — | — | NW 9 | — |
| kJ | — | — | — | — | — | — | 16 | 6 | 22 | 55 | — | — | — | — | — | — | — | — | — | — | — | — | 3 | — |
Wind waves Height (m) Direction Period (s) | — | SSE 2 | SE 3 | SE 3 | SSE 3 | SSE 3 | S 3 | S 3 | SSW 3 | SSW 3 | SW 3 | WSW 5 | WSW 5 | — | — | — | — | — | — | — | S 3 | S 3 | S 3 | S 3 |
| kJ | — | 1 | 4 | 5 | 4 | 4 | 5 | 5 | 2 | 2 | 2 | 41 | 46 | — | — | — | — | — | — | — | 1 | 2 | 5 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 8 | 8 | 130 | 8 | 9 | 9 | 57 | 48 | 48 | 8 | 48 | 42 | 123 | 73 | 73 | 182 | 73 | 8 | 0 | 0 | 48 | 48 | 48 | 48 |
Best forecast wave conditions in Donegal | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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