Surf Forecasts:
How big are the waves at Castlerock today (28 Sep):
- Morning surf: Morning surf (28 Sep, local time) - 3ft (0.9m), 12s period with WNW swell.
- Afternoon surf: Afternoon surf (28 Sep, local time) - 3ft (0.9m), 11s period with NW swell.
- Evening surf: Evening surf (28 Sep, local time) - 3ft (0.9m), 11s period with NW swell.
The current surf forecast for Castlerock at 7AM is: 0.9m 12s primary swell from a West-northwest direction and 0.1m 12s secondary swell from a North direction (forecast issued at 12:00am September 28). An open ocean swell of 0.2m 2s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 Sep) | 3ft (0.9m) | 12s |
| Afternoon (28 Sep) | 3ft (0.9m) | 11s |
| Evening (28 Sep) | 3ft (0.9m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 15mm), heaviest on Tue night. Very mild (max 18°C on Tue night, min 9°C on Sun night). Winds increasing (light winds from the SSE on Mon afternoon, strong winds from the SE by Tue afternoon). | ||||||||||||||||||||||||
Monday 28 | Tuesday 29 | Wednesday 30 | ||||||||||||||||||||||
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) | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | NW 11 | NW 11 | NW 11 | WNW 10 | NW 11 | NW 11 | WNW 11 | WNW 11 | NW 10 | WNW 10 | W 11 | NW 10 | N 10 | W 14 | W 13 | W 12 | W 12 | WNW 14 | WNW 15 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 275 | 255 | 247 | 218 | 190 | 169 | 166 | 166 | 88 | 126 | 121 | 78 | 44 | 26 | 10 | 4 | 4 | 2 | 4 | 4 | 3 | 3 | 36 | 270 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | 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 | off | off | off | off | off | cross-off | off |
High Tide | 7:31AM1.78m | 7:50PM1.96m | 8:05AM1.78m | 8:25PM1.87m | 8:41AM1.73m | 9:03PM1.71m | ||||||||||||||||||
Low Tide | 1:41AM0.06m | 1:39PM0.03m | 2:09AM0.09m | 2:12PM0.07m | 2:38AM0.17m | 2:49PM0.17m | ||||||||||||||||||
 |  | |  |  | | | | | | | |  | | |  |  |  | | | |  |  | | |
 | — | — | 7:22 | — | — | — | — | — | — | — | 7:24 | — | — | — | — | — | — | — | 7:26 | — | — | — | — | — |
 | — | — | — | — | — | — | 7:12 | — | — | — | — | — | — | — | 7:08 | — | — | — | — | — | — | — | 7:06 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 8 | — | — | — | 3 | 3 | — |
Temp °C | 10 | 9 | 9 | 11 | 14 | 15 | 14 | 11 | 11 | 13 | 12 | 13 | 14 | 15 | 17 | 18 | 18 | 17 | 15 | 14 | 16 | 14 | 13 | 12 |
Feels °C | 6 | 5 | 5 | 6 | 10 | 11 | 11 | 6 | 6 | 8 | 6 | 6 | 6 | 7 | 9 | 11 | 11 | 12 | 11 | 7 | 9 | 9 | 7 | 6 |
Swell 1 Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 12 | WNW 12 | WNW 11 | NW 11 | NW 11 | NW 11 | WNW 10 | NW 11 | NW 11 | WNW 11 | WNW 11 | NW 10 | WNW 10 | NW 10 | NW 10 | N 10 | ESE 7 | W 13 | W 12 | SE 5 | ESE 5 | WNW 15 |
| kJ | 275 | 255 | 247 | 218 | 190 | 169 | 166 | 166 | 88 | 126 | 121 | 78 | 44 | 26 | 10 | 4 | 4 | 2 | 107 | 4 | 3 | 19 | 10 | 270 |
Swell 2 Height (m) Direction Period (s) | E 6 | NW 9 | N 12 | N 12 | N 11 | — | — | — | NW 12 | — | — | — | N 10 | N 11 | W 12 | W 11 | N 10 | W 10 | N 10 | N 10 | N 9 | W 12 | WNW 14 | ESE 4 |
| kJ | 1 | 3 | 3 | 3 | 3 | — | — | — | 53 | — | — | — | 2 | 2 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 3 | 36 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 6 | N 12 | — | — | — | — | — | — | — | — | — | — | — | — | N 11 | N 11 | — | — | W 14 | — | — | N 9 | W 9 | N 10 |
| kJ | 2 | 3 | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 2 | — | — | 4 | — | — | 2 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | — | SSW 2 | SSW 2 | — | — | — | — | SE 3 | SE 3 | ESE 4 | ESE 5 | ESE 5 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | ESE 6 | — | SE 4 | SSE 4 | S 4 | S 3 | S 3 |
| kJ | — | 1 | 1 | — | — | — | — | 2 | 5 | 20 | 40 | 77 | 156 | 139 | 197 | 233 | 254 | 209 | — | 23 | 31 | 7 | 3 | 3 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 | 336 | 336 | 336 | 390 | 850 | 1035 | 318 | 518 | 480 | 707 | 273 | 270 | 266 | 282 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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