Surf Forecasts:
How big are the waves at Castlerock today (18 Jun):
- Morning surf: Morning surf (18 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
- Afternoon surf: Afternoon surf (18 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
- Evening surf: Evening surf (18 Jun, local time) - 1.5ft (0.4m), 10s period with WNW swell.
The current surf forecast for Castlerock at 11AM is: 0.4m 10s primary swell from a West-northwest direction (forecast issued at 06:00am June 18). An open ocean swell of 0.3m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Jun) | 1.5ft (0.4m) | 10s |
| Afternoon (18 Jun) | 1.5ft (0.4m) | 10s |
| Evening (18 Jun) | 1.5ft (0.4m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 19mm), heaviest on Thu night. Very mild (max 16°C on Thu afternoon, min 11°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
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 | 1 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | NW 8 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | WNW 7 | WNW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 56 | 32 | 33 | 33 | 37 | 38 | 36 | 32 | 30 | 18 | 19 | 18 | 16 | 15 | 15 | 14 | 14 | 5 | 5 | 12 | 12 | 12 | 16 | 12 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | on | glassy | off | cross-off | cross-on | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | glassy | glassy |
High Tide | 9:03AM1.50m | 9:36PM1.90m | 9:49AM1.38m | 10:29PM1.81m | 10:39AM1.27m | 11:26PM1.70m | ||||||||||||||||||
Low Tide | 3:30AM0.18m | 3:18PM0.14m | 4:25AM0.28m | 4:05PM0.19m | 5:20AM0.38m | 4:55PM0.27m | ||||||||||||||||||
 |  | |  | | | | |  |  | | |  | |  |  | |  | | | | | | | |
 | 4:46 | — | — | — | — | — | — | — | 4:46 | — | — | — | — | — | — | — | 4:46 | — | — | — | — | — | — | 4:46 |
 | — | — | — | — | — | — | 10:09 | — | — | — | — | — | — | — | 10:09 | — | — | — | — | — | — | — | 10:09 | 10:10 |
mm | — | 2 | 1 | — | 1 | 2 | — | — | 3 | 6 | 3 | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 13 | 14 | 14 | 16 | 14 | 13 | 15 | 15 | 12 | 12 | 14 | 15 | 14 | 13 | 12 | 11 | 11 | 14 | 15 | 15 | 16 | 14 | 12 |
Feels °C | 9 | 10 | 11 | 12 | 15 | 14 | 13 | 14 | 15 | 11 | 12 | 13 | 13 | 14 | 12 | 10 | 9 | 9 | 11 | 12 | 12 | 14 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | NW 8 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | WNW 7 | WNW 7 | — | NW 7 | NW 7 | NW 7 | NW 7 |
| kJ | 56 | 32 | 33 | 33 | 37 | 38 | 36 | 32 | 30 | 18 | 19 | 18 | 16 | 15 | 15 | 14 | 14 | 5 | 5 | — | 12 | 12 | 16 | 12 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | ESE 3 | — | — | SE 5 | — | — | — | — | — | — | — | — | WNW 4 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | E 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSE 2 | SE 3 | ESE 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 4 | NW 7 | WNW 2 | — | — | — |
| kJ | — | — | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 12 | 1 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 8 | 14 | 14 | 14 | 14 | 14 | 14 | 40 | 42 | 42 | 41 | 40 | 40 | 40 | 40 | 42 | 42 | 56 | 172 | 409 | 409 | 421 | 42 | 42 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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Live Wave Height (m)
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