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Surf Forecasts:
Rossnowlagh surfForecast / Donegal / Ireland
48hr Weather and Surf, issued 12 am Wednesday 20 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
11.4° C
(Which is normal for this time of year)How big are the waves at Rossnowlagh today?
The current surf forecast for Rossnowlagh at 7AM is: 1.6m 14s primary swell from a West direction (forecast issued at 12:00am May 20). The wind direction is predicted to be cross-onshore.
| Time (IST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 5ft (1.6m) | 14s |
| Afternoon (20 May) | 4.5ft (1.4m) | 13s |
| Evening (20 May) | 4ft (1.2m) | 12s |
Table - waves today at Rossnowlagh. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 10mm), heaviest on Thu afternoon. Very mild (max 18°C on Fri morning, min 9°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 | 4 PM | 7 PM | 10 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
W 15 | W 14 | W 14 | W 14 | W 13 | W 13 | W 12 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 10 | W 11 | W 12 | W 12 | W 11 | W 11 | |
1051 | 932 | 1042 | 932 | 760 | 640 | 413 | 336 | 268 | 206 | 149 | 146 | 112 | 112 | 110 | 82 | 110 | 110 | 108 | 82 | 108 | 103 | 123 | 116 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross-on | on | on | on | cross-on | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | cross-on | |
High Tide | 9:06AM3.19m | 9:29PM3.61m | 10:03AM2.93m | 10:28PM3.45m | 11:07AM2.69m | |||||||||||||||||||
Low Tide | 2:47AM0.17m | 2:55PM0.38m | 3:45AM0.37m | 3:47PM0.60m | 4:51AM0.59m | 4:47PM0.82m | ||||||||||||||||||
 |  |  |  | |  | | | |  | | | | | | | | | | | | | | | |
 | — | 5:20 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 9:38 | — | — | — | — | — | — | — | 9:40 | — | — | — | — | — | — | — | 9:43 | — |
— | — | 2 | — | — | — | — | — | — | 1 | — | — | — | 2 | 3 | 1 | — | — | — | — | — | — | — | — | |
Temp °C | 9 | 10 | 11 | 11 | 13 | 14 | 13 | 13 | 12 | 13 | 14 | 14 | 16 | 16 | 15 | 14 | 13 | 12 | 13 | 15 | 18 | 18 | 17 | 14 |
6 | 7 | 7 | 6 | 8 | 10 | 11 | 12 | 10 | 11 | 12 | 12 | 14 | 15 | 13 | 11 | 9 | 10 | 11 | 12 | 14 | 14 | 15 | 13 | |
Swell 1 Height (m) Direction Period (s) | W 15 | W 14 | W 14 | W 14 | W 13 | W 13 | W 12 | W 12 | W 12 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 10 | W 11 | W 12 | W 12 | W 11 | W 11 |
 kJ | 1051 | 932 | 1042 | 932 | 760 | 640 | 413 | 336 | 268 | 206 | 149 | 146 | 112 | 112 | 110 | 82 | 110 | 110 | 108 | 82 | 108 | 103 | 123 | 116 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | NW 10 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | W 14 | N 7 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 4 | 24 | 23 | 16 | 9 | 2 | 2 | 2 | 2 | 2 | 14 | 1 | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 7 | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SW 4 | — | — | — | — | — | — | SSE 2 | SSE 3 | S 3 | SSW 3 | S 3 | SSW 3 | S 3 | S 3 | SSE 3 | SSE 3 | SSE 3 | SSE 3 | SSW 3 | SSW 3 | SSW 3 | — |
| kJ | — | 10 | — | — | — | — | — | — | 1 | 2 | 5 | 3 | 2 | 1 | 1 | 6 | 3 | 3 | 1 | 3 | 3 | 2 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 8 | 8 | 114 | 284 | 284 | 73 | 8 | 0 | 0 | 0 | 48 | 8 | 8 | 8 | 66 | 42 | 8 | 0 | 0 | 48 | 48 | 73 | 73 | 42 |
Best forecast wave conditions in Donegal | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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