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Surf Forecasts:

Castles Beach surf break

Castles Beach surfForecast / HAW – Oahu / USA

information circle48hr Weather and Surf, issued 7 pm Tuesday 17 Mar 2026 HST
Forecast update in hr  min  s Forecast update imminent
Castles Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles Beach sea temperature is
24.3° C
 (Which is normal for this time of year)

How big are the waves at Castles Beach today?

The current surf forecast for Castles Beach at 3AM is: 0.4m 16s primary swell from a South direction and 0.4m 8s secondary swell from a East-southeast direction (forecast issued at 07:00pm March 17). An open ocean swell of 1.9m 13s is not directed at the surf break. The wind direction is predicted to be onshore.

Time (HST) & DateWave HeightWave Period
Morning (18 Mar)1.5ft (0.5m)16s
Afternoon (18 Mar)1.5ft (0.5m)16s
Evening (18 Mar)1.5ft (0.5m)15s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.5
E
0.3
S
0.4
S
0.4
S
0.4
S
0.4
S
0.5
S
0.5
S
0.5
S
0.5
S
0.5
S
0.5
S
0.5
S
0.5
S
0.5
S
0.5
S
0.4
S
0.4
S
0.4
S
0.4
S
0.4
S
0.7
E
0.7
E
0.4
S
Period(s) (?)816161616161616151515141414141414141313136713
Wave
Graph
(?)Metric surfscale
Energy kJ (?)324782818079124121113107104103102102100996157555554354354
Wind
(km/h)
10
E
5
ESE
10
ENE
5
E
10
E
10
ENE
15
E
10
E
10
ESE
10
ESE
10
SSE
10
SE
10
SSE
10
SSW
15
SSE
20
SSE
15
SSE
15
SSE
15
SSE
15
S
10
SSW
10
S
15
S
20
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
onononononononononcross-
on		cross-
on		cross-
on		crosscross-
off		cross-
on		cross-
on		cross-
on		crosscross-
on		crosscross-
off		crosscrosscross-
off
High Tide
/ height (m)
2:14AM
0.79
2:36PM
0.70
2:35AM
0.76
3:17PM
0.75
2:56AM
0.70
Low Tide
/ height (m)
7:50PM
0.17
8:34AM
0.17
8:30PM
0.20
8:55AM
0.12
9:13PM
0.26
9:18AM
0.08
Tuesday
17
Wednesday
18
Thursday
19
Friday
20
Sunrise-----6:37-------6:35-------6:35--
Sunset6:40-------6:40-------6:40-------
rain showers
part cloud
part cloud
cloud
part cloud
cloud
part cloud
thunderstorm
thunderstorm
cloud
cloud
cloud
thunderstorm
cloud
clear
clear
thunderstorm
thunderstorm
thunderstorm
cloud
cloud
thunderstorm
part cloud
thunderstorm
Rain (mm)
2------11---3---211--1-1
Temp. °C212222222222232323242323232325252525242424242525
Feels °C (?)232424242323242424262525252526252626252526262525
  • 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 Castles Beach 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 Castles Beach at:
surf-forecast.com

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