Surf Forecasts:
How big are the waves at Castlerock today (27 Sep):
- Morning surf: Morning surf (27 Sep, local time) - 2.5ft (0.8m), 11s period with WNW swell.
- Afternoon surf: Afternoon surf (27 Sep, local time) - 2.5ft (0.8m), 11s period with WNW swell.
- Evening surf: Evening surf (27 Sep, local time) - 3.5ft (1.0m), 12s period with WNW swell.
The current surf forecast for Castlerock at 5AM is: 0.9m 10s primary swell from a West-northwest direction (forecast issued at 12:00am September 27). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Sep) | 2.5ft (0.8m) | 11s |
| Afternoon (27 Sep) | 2.5ft (0.8m) | 11s |
| Evening (27 Sep) | 3.5ft (1.0m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 12mm), heaviest on Sun morning. Very mild (max 15°C on Tue morning, min 8°C on Sun night). Winds increasing (light winds from the SSW on Sun night, strong winds from the SE by Tue afternoon). | ||||||||||||||||||||||||
Sunday 27 | Monday 28 | Tuesday 29 | ||||||||||||||||||||||
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 |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | NW 10 | WNW 10 | NW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | NW 11 | NW 11 | WNW 10 | NW 11 | NW 11 | WNW 11 | WNW 11 | NW 10 | WNW 10 | WNW 10 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 212 | 192 | 166 | 143 | 109 | 145 | 180 | 330 | 275 | 251 | 247 | 243 | 211 | 207 | 169 | 169 | 88 | 123 | 121 | 78 | 44 | 27 | 20 | 10 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-on | cross-off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:58AM1.73m | 7:17PM2.00m | 7:31AM1.78m | 7:50PM1.96m | 8:05AM1.78m | 8:25PM1.87m | ||||||||||||||||||
Low Tide | 1:14AM0.08m | 1:08PM0.02m | 1:41AM0.06m | 1:39PM0.03m | 2:09AM0.09m | 2:12PM0.07m | ||||||||||||||||||
 |  | |  |  |  |  | | | |  | | | |  | | | | | |  | | | | |
 | — | — | 7:20 | — | — | — | — | — | — | — | 7:22 | — | — | — | — | — | — | — | 7:24 | — | — | — | — | — |
 | — | — | — | — | — | — | 7:14 | — | — | — | — | — | — | — | 7:12 | — | — | — | — | — | — | — | 7:08 | — |
mm | — | — | — | 2 | 9 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 13 | 14 | 12 | 11 | 13 | 12 | 11 | 10 | 9 | 8 | 10 | 14 | 14 | 13 | 11 | 11 | 12 | 11 | 13 | 15 | 14 | 15 | 16 |
Feels °C | 8 | 8 | 9 | 8 | 4 | 8 | 7 | 7 | 6 | 5 | 4 | 6 | 10 | 9 | 9 | 6 | 7 | 7 | 6 | 7 | 8 | 7 | 7 | 8 |
Swell 1 Height (m) Direction Period (s) | NW 10 | WNW 10 | NW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | NW 11 | NW 11 | WNW 10 | NW 11 | NW 11 | WNW 11 | WNW 11 | NW 10 | WNW 10 | WNW 10 |
| kJ | 212 | 192 | 166 | 143 | 109 | 145 | 180 | 330 | 275 | 251 | 247 | 243 | 211 | 207 | 169 | 169 | 88 | 123 | 121 | 78 | 44 | 27 | 20 | 10 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NW 10 | ESE 4 | ESE 5 | NW 10 | E 4 | E 6 | N 12 | N 12 | N 12 | N 11 | — | — | — | NW 12 | — | — | — | N 10 | N 11 | N 11 | N 11 |
| kJ | — | — | — | 15 | 12 | 19 | 23 | 1 | 1 | 3 | 3 | 3 | 3 | — | — | — | 72 | — | — | — | 2 | 2 | 2 | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | NW 10 | NW 10 | ESE 4 | NW 9 | — | — | NW 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 27 | 24 | 4 | 3 | — | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | SSE 3 | SSE 3 | SSE 4 | SSW 3 | WNW 3 | W 3 | SSW 2 | — | SSW 2 | — | — | S 2 | SSE 2 | SSE 2 | SE 3 | SE 4 | ESE 4 | ESE 5 | ESE 5 | ESE 5 | ESE 5 | ESE 5 | ESE 6 |
| kJ | 1 | 4 | 8 | 11 | 2 | 4 | 4 | 1 | — | 1 | — | — | 1 | 1 | 1 | 3 | 10 | 20 | 33 | 46 | 86 | 95 | 95 | 129 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 404 | 185 | 0 | 42 | 254 | 9 | 9 | 4 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | 41 | 336 | 336 | 350 | 390 | 350 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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