Surf Forecasts:
How big are the waves at Castlerock today (14 Sep):
- Morning surf: Morning surf (14 Sep, local time) - 1.5ft (0.5m), 9s period with NW swell.
- Afternoon surf: Afternoon surf (14 Sep, local time) - 1.5ft (0.5m), 8s period with NW swell.
- Evening surf: Evening surf (14 Sep, local time) - 1.5ft (0.5m), 10s period with WNW swell.
The current surf forecast for Castlerock at 11PM is: 0.5m 10s primary swell from a West-northwest direction and 0.2m 12s secondary swell from a North direction (forecast issued at 12:00pm September 14). The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Sep) | 1.5ft (0.5m) | 9s |
| Afternoon (14 Sep) | 1.5ft (0.5m) | 8s |
| Evening (14 Sep) | 1.5ft (0.5m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 17°C on Mon morning, min 12°C on Wed night). Mainly fresh winds. | |||||||||||||||||||||
Mon 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||||||
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 9 | NW 9 | WNW 8 | WNW 11 | WNW 10 | WNW 10 | WNW 9 | WNW 11 | WNW 10 | WNW 10 | NW 5 | NW 5 | NW 6 | NW 6 | NW 6 | NW 7 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 38 | 36 | 28 | 65 | 59 | 59 | 34 | 44 | 40 | 38 | 40 | 74 | 80 | 116 | 150 | 164 | 414 | 341 | 250 | 184 | 120 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off |
High Tide | 8:23AM1.69m | 8:45PM1.78m | 8:53AM1.63m | 9:13PM1.60m | 9:24AM1.54m | 9:41PM1.41m | |||||||||||||||
Low Tide | 2:39PM0.09m | 3:04AM0.25m | 3:12PM0.22m | 3:29AM0.36m | 3:47PM0.38m | ||||||||||||||||
 |  | | |  |  | |  | |  | |  | | | |  | | | | |  | |
 | 6:56 | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | — | 7:00 | — | — | — | — | — |
 | — | — | — | 7:47 | — | — | — | — | — | — | — | 7:45 | — | — | — | — | — | — | — | 7:43 | — |
mm | — | 1 | 2 | 2 | — | — | — | — | — | 1 | 1 | — | — | — | — | 1 | 1 | — | — | — | 1 |
Temp °C | 16 | 17 | 16 | 17 | 17 | 15 | 13 | 13 | 13 | 15 | 15 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 15 | 14 | 13 |
Feels °C | 14 | 16 | 15 | 16 | 15 | 11 | 10 | 8 | 9 | 9 | 10 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 11 | 10 | 8 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NW 9 | WNW 8 | WNW 11 | WNW 10 | WNW 10 | WNW 7 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | N 9 | WNW 10 | WNW 12 | WNW 12 | WNW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 9 |
| kJ | 38 | 36 | 28 | 65 | 59 | 59 | 26 | 44 | 40 | 38 | 38 | 2 | 35 | 15 | 82 | 113 | 414 | 341 | 250 | 184 | 120 |
Swell 2 Height (m) Direction Period (s) | N 13 | N 13 | N 13 | N 12 | N 12 | N 12 | WNW 9 | NW 6 | N 10 | N 9 | N 9 | N 9 | — | — | — | — | — | — | — | — | — |
| kJ | 14 | 13 | 13 | 12 | 11 | 11 | 34 | 16 | 7 | 2 | 2 | 2 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | N 10 | N 9 | N 9 | N 9 | — | — | NW 11 | N 10 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 2 | 2 | 2 | — | — | 19 | 8 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | SSE 2 | SSE 2 | — | — | SW 2 | W 3 | SW 2 | WNW 5 | NW 5 | NW 5 | NW 5 | NW 6 | NW 6 | NW 6 | NW 7 | — | — | — | SW 2 | SW 2 |
| kJ | — | 1 | 1 | — | — | 1 | 6 | 1 | 11 | 19 | 40 | 74 | 80 | 116 | 150 | 164 | — | — | — | 1 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 8 | 14 | 0 | 0 | 187 | 9 | 398 | 366 | 833 | 772 | 772 | 413 | 413 | 440 | 236 | 71 | 159 | 9 | 9 | 25 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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