Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 11 pm Friday 27 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
8.4° 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: 4.5m 17s primary swell from a Northwest direction (forecast issued at 11:00pm March 27). The wind direction is predicted to be cross-shore.

Time (GMT) & DateWave HeightWave Period
Morning (28 Mar)15ft (4.5m)16s
Afternoon (28 Mar)13ft (4.0m)14s
Evening (28 Mar)10ft (3.0m)13s

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


Updates in  hr  min  s Forecast update imminent
Saturday
28
Sunday
29
Monday
30
9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM9PM0AM3AM6AM9AM12PM3PM6PM
Rating
(10 max)
0
0
0
0
0
0
0
0
4
3
2
2
0
0
0
0
0
0
0
0
0
0
4
3
Swell
Height Map
Wave Height (m) & direction (?)
4.5
NW
4.5
NW
4.5
NW
5
NW
4.5
NW
4.5
NW
4
NW
3.5
NW
3
NW
2.5
NW
2.2
NW
1.9
NW
2
NW
2.5
NW
3.5
NW
4.5
NW
4.5
NW
4.5
NW
4.5
NW
4.5
NW
4
NW
4
NW
3.5
NW
3
NW
Period(s) (?)171717161615141413131212111214161616171717171616
Wave
Graph
(?)Metric surfscale
Energy kJ (?)11457109371129812211108188840616345503123231314151007947164946319418112491084311052111199607836462425210
Wind
(km/h)
40
W
40
W
40
WNW
40
WNW
40
WNW
40
WNW
40
WNW
30
WNW
20
WSW
20
SSW
30
SSW
35
SW
40
WSW
40
W
45
W
50
W
45
WNW
40
WNW
40
WNW
40
WNW
35
WNW
35
WNW
30
WNW
25
W
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscrosscrosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crosscrosscrosscrosscrosscrosscrosscross-
on
cross-
on
crosscross
High Tide
/ height (m)
2:51AM
1.46
3:27PM
1.21
3:47AM
1.64
4:10PM
1.35
4:29AM
1.80
4:46PM
1.47
Low Tide
/ height (m)
8:17PM
0.61
9:46AM
0.46
9:29PM
0.45
10:33AM
0.32
10:16PM
0.29
11:09AM
0.22
Saturday
28
Sunday
29
Monday
30
Sunrise----6:09-------6:07-------6:05---
Sunset-------6:54-------6:57-------6:59
light rain
light rain
rain showers
rain showers
rain showers
light rain
rain showers
clear
part cloud
part cloud
cloud
light rain
light rain
rain showers
clear
part cloud
cloud
cloud
cloud
part cloud
part cloud
part cloud
cloud
cloud
Rain (mm)
1111111----142----------
Temp. °C66556777666791010877778888
Feels °C (?)-4-4-5-5-4-3-3010-1-1010-3-3-3-2-2-1-102
  • 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

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.


Nearest locationNearest
Nearest locationNearest
Nearest locationNearest