Surf Forecasts:
How big are the waves at Castlerock today (06 Sep):
- Afternoon surf: Afternoon surf (06 Sep, local time) - 1.5ft (0.4m), 8s period with NW swell.
- Evening surf: Evening surf (06 Sep, local time) - 1.5ft (0.4m), 11s period with WNW swell.
The current surf forecast for Castlerock at 9PM is: 0.4m 11s primary swell from a West-northwest direction (forecast issued at 06:00pm September 06). An open ocean swell of 0.2m 4s is not directed at the surf break, a second open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (06 Sep) | - | - |
| Afternoon (06 Sep) | 1.5ft (0.4m) | 8s |
| Evening (06 Sep) | 1.5ft (0.4m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 8mm), mostly falling on Mon night. Very mild (max 19°C on Sun afternoon, min 12°C on Mon night). Winds decreasing (strong winds from the WNW on Tue afternoon, light winds from the WNW by Wed morning). | |||||||||||||||||||
Sun 6 | Monday 7 | Tuesday 8 | |||||||||||||||||
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 8 | WNW 11 | WNW 11 | WNW 11 | WNW 7 | WNW 8 | WNW 8 | WNW 10 | WNW 10 | WNW 11 | NW 11 | WNW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 11 | NW 11 | NNW 11 |
Wave Graph  | |||||||||||||||||||
 kJ | 15 | 23 | 42 | 24 | 19 | 50 | 86 | 220 | 272 | 375 | 439 | 382 | 650 | 844 | 1204 | 1616 | 3153 | 3255 | 2295 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on |
High Tide | 3:13PM1.33m | 3:55AM1.24m | 4:26PM1.54m | 4:53AM1.37m | 5:16PM1.76m | ||||||||||||||
Low Tide | 10:04PM0.55m | 10:11AM0.50m | 11:12PM0.38m | 11:05AM0.32m | |||||||||||||||
 |  |  | | | | |  |  | | |  | | |  | | | |  | |
 | — | — | — | — | 6:43 | — | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — |
 | — | 8:07 | — | — | — | — | — | — | — | 8:06 | — | — | — | — | — | — | — | 8:02 | — |
mm | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | 2 | 2 | — | 1 | 1 | — |
Temp °C | 19 | 19 | 16 | 14 | 13 | 13 | 14 | 16 | 16 | 14 | 12 | 12 | 12 | 13 | 13 | 14 | 13 | 13 | 13 |
Feels °C | 16 | 16 | 13 | 12 | 9 | 9 | 9 | 10 | 11 | 9 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 5 |
Swell 1 Height (m) Direction Period (s) | NW 8 | WNW 11 | WNW 11 | WNW 6 | WNW 7 | WNW 8 | WNW 8 | WNW 10 | WNW 10 | WNW 11 | NW 11 | WNW 11 | NW 11 | NW 11 | — | — | — | — | — |
| kJ | 15 | 23 | 42 | 15 | 19 | 50 | 86 | 220 | 272 | 375 | 439 | 382 | 650 | 844 | — | — | — | — | — |
Swell 2 Height (m) Direction Period (s) | WNW 8 | ESE 4 | ESE 4 | WNW 11 | W 11 | WNW 15 | WNW 14 | — | — | — | — | NW 13 | NW 13 | — | — | — | — | — | — |
| kJ | 14 | 1 | 1 | 24 | 9 | 21 | 19 | — | — | — | — | 138 | 45 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SE 7 | NNW 8 | NW 8 | ESE 4 | NW 16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 6 | 2 | 1 | 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | S 3 | WSW 2 | — | SW 2 | SW 2 | SW 3 | SW 3 | SW 3 | SW 3 | SW 3 | SW 3 | WSW 3 | WSW 4 | NW 10 | NW 10 | NW 11 | NW 11 | NNW 11 |
| kJ | 4 | 1 | 1 | — | 1 | 2 | 2 | 3 | 3 | 1 | 3 | 4 | 6 | 14 | 1204 | 1616 | 3153 | 3255 | 2295 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 404 | 559 | 172 | 42 | 27 | 9 | 187 | 9 | 558 | 528 | 559 | 380 | 380 | 380 | 380 | 382 | 460 | 862 | 862 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
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