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Surf Forecasts:
Rossnowlagh surfForecast / Donegal / Ireland
48hr Weather and Surf, issued 12 pm 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 3PM is: 1.4m 13s primary swell from a West direction (forecast issued at 12:00pm 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 12mm), heaviest on Thu afternoon. Very mild (max 18°C on Fri morning, min 10°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 | 1 AM | 4 AM | 7 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
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 10 | W 11 | W 11 | W 11 | W 12 | W 12 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | W 11 | |
820 | 663 | 551 | 413 | 336 | 325 | 206 | 149 | 114 | 112 | 112 | 110 | 82 | 80 | 82 | 83 | 85 | 99 | 98 | 123 | 117 | 106 | 104 | 83 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-on | cross-on | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | |
High Tide | 9:06AM3.19m | 9:29PM3.61m | 10:03AM2.93m | 10:28PM3.45m | 11:07AM2.69m | 11:32PM3.30m | ||||||||||||||||||
Low Tide | 2:55PM0.38m | 3:45AM0.37m | 3:47PM0.60m | 4:51AM0.59m | 4:47PM0.82m | 6:06AM0.74m | ||||||||||||||||||
 |  |  |  |  | |  | | | | | | |  | | | | | | | |  | | | |
 | 5:20 | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:15 | — |
 | — | — | — | 9:38 | — | — | — | — | — | — | — | 9:40 | — | — | — | — | — | — | — | 9:43 | — | — | — | 9:44 |
1 | — | — | — | — | — | 1 | — | — | — | 2 | 4 | — | 1 | — | — | — | — | 1 | 1 | 1 | — | — | — | |
Temp °C | 11 | 13 | 15 | 13 | 12 | 11 | 12 | 14 | 15 | 17 | 16 | 15 | 15 | 13 | 12 | 13 | 15 | 18 | 17 | 14 | 13 | 11 | 10 | 10 |
7 | 8 | 11 | 11 | 10 | 9 | 10 | 12 | 13 | 15 | 14 | 12 | 11 | 10 | 10 | 10 | 12 | 13 | 14 | 12 | 12 | 9 | 8 | 8 | |
Swell 1 Height (m) Direction Period (s) | 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 10 | W 11 | W 11 | W 11 | W 12 | W 12 | WSW 11 | WSW 11 | WSW 10 | WSW 10 | W 11 |
 kJ | 820 | 663 | 551 | 413 | 336 | 325 | 206 | 149 | 114 | 112 | 112 | 110 | 82 | 80 | 82 | 83 | 85 | 99 | 98 | 123 | 117 | 106 | 104 | 83 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 6 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | N 6 | — | — | — | W 12 | — |
| kJ | — | — | — | — | — | — | 10 | 23 | 22 | 14 | 8 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | — | — | — | 12 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | NW 9 | N 9 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SSE 3 | S 3 | SSW 3 | SSW 3 | SSW 3 | S 3 | SSE 3 | S 3 | SSE 3 | SSE 3 | S 3 | SSW 3 | SW 3 | — | — | — | — | SSW 3 |
| kJ | — | — | — | — | — | — | 2 | 3 | 3 | 2 | 3 | 4 | 3 | 5 | 3 | 3 | 1 | 3 | 3 | — | — | — | — | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 114 | 73 | 182 | 8 | 0 | 0 | 0 | 48 | 48 | 8 | 48 | 66 | 202 | 8 | 8 | 48 | 48 | 48 | 48 | 34 | 8 | 8 | 0 | 8 |
Best forecast wave conditions in Donegal | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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