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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 11 pm Tuesday 10 Mar 2026 GMT
Forecast update in hr  min  s Forecast update imminent
Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castlerock sea temperature is
8.1° C
 (Which is normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 3AM is: 2.5m 14s primary swell from a Northwest direction (forecast issued at 11:00pm March 10). An open ocean swell of 0.9m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (GMT) & DateWave HeightWave Period
Morning (11 Mar)13ft (4.0m)14s
Afternoon (11 Mar)10ft (3.0m)14s
Evening (11 Mar)8ft (2.5m)13s

Table - waves today at Castlerock. (Swell directed towards the surf break)

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Wednesday
11
Thursday
12
Friday
13
9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM
Rating
(10 max)
0
0
0
2
0
3
3
1
1
0
0
1
2
2
0
2
3
0
0
3
3
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.2
NW
1.6
WNW
2.5
NW
3
NW
4
WNW
3.5
NW
3
NW
2.5
NW
2.5
NW
2.4
NW
2.5
NW
2.5
NW
2.5
NW
2.5
NW
2.5
NW
3
NW
3.5
NW
3.5
NW
3
NW
2.5
NW
2.5
NW
2.5
NW
2.5
NW
3
NW
Period(s) (?)141314141414141413131414141414151616161616151514
Wave
Graph
(?)Metric surfscale
Energy kJ (?)5328752448351761384334356927752094198223712474243925572927399058656086489936193021286930343154
Wind
(km/h)
45
SW
50
SW
45
WSW
45
WSW
45
W
35
WSW
30
WSW
35
SW
45
SW
50
SW
50
SW
50
SSW
30
W
30
WSW
45
WSW
40
SW
40
SW
55
SW
55
SW
30
WSW
25
WSW
35
W
35
WNW
30
WNW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		crosscross-
on		cross-
on
High Tide
/ height (m)
9:43PM
1.25
9:55AM
1.10
10:47PM
1.11
11:22AM
0.97
2:40AM
1.11
3:05PM
1.03
Low Tide
/ height (m)
4:19AM
0.72
4:26PM
0.73
6:28AM
0.84
7:07PM
0.78
9:15AM
0.77
Wednesday
11
Thursday
12
Friday
13
Sunrise----6:52-------6:50-------6:48---
Sunset-------6:21-------6:22-------6:24
rain showers
part cloud
part cloud
clear
clear
part cloud
cloud
cloud
cloud
cloud
cloud
cloud
mod rain
mod rain
rain showers
cloud
rain showers
light rain
light rain
rain showers
part cloud
clear
rain showers
light rain
Rain (mm)
3-----------761-1132--11
Temp. °C98767888891010856533346777
Feels °C (?)-1-3-4-4-300-1-2-2-1-11-3-5-4-7-10-9-4-1-2-2-1
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Castlerock at:
surf-forecast.com

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