Castles Beach Surf Forecast and Surf Reports

(Oahu, USA)

Forecast
- Hourly Forecast
- 16 Day Forecast
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Weather State
Spot Information

Castles Beach Surf Guide

Castles in Oahu is an exposed beach and reef break. Summer offers the optimum conditions for surfing. Works best in offshore winds from the north northeast. Tends to receive a mix of groundswells and windswells and the optimum swell angle is from the south southeast. A reef breaks left. Even when there are waves, it's not likley to be crowded. Beware of rocks,etc.

Castles Beach Spot Info

Type:	Rating:	Reliability:	Todays Sea Temp*:
Beach	2	fairly consistent	24.9°C*ocean temperature recorded from satellite

Surfing Castles Beach:

The best conditions reported for surf at Castles Beach occur when a Northeast swell combines with an offshore wind direction from the West.

Hourly Forecast

16 Day Forecast

What's the best time of year to surf Castles Beach (for consistent clean waves)?

novemberBest Season: winter

The best time of year for surfing Castles Beach with consistent clean waves (rideable swell with light / offshore winds) is during Winter and most often the month of November. Clean surfable waves are typically found 5% of the time in November while 44% of the time it tends to be blown out. For the remaining 51% of the time it is considered too small by most surfers but may still be OK for beginners and groms at times.

clean

Surfable waves that hold up well for longer rides in prevailing cross-offshore, offshore or light wind conditions.

blown out

44%

Surfable sized waves that are of poorer quality due to prevailing onshore, cross-onshore or windy conditions (may be preferable for kitesurfing).

too small

51%

Waves usually considered too small for good surf. Some wave-magnet breaks may still work though if conditions are right (on occasion).

Explore Castles Beach Location Map

Interactive Castles Beach surf break location map. View information about nearby surf breaks, their wave consistency and rating compared to other spots in the region. Current swell conditions from local buoys are shown along with live wind speed and direction from nearby weather stations. Click icons on the map for more detail. The closest passenger airport to Castles is Kaneohe Bay Mcaf Airport (NGF) in Usa Oahu Isl., 4 km (2 miles) away (directly). The second nearest airport to Castles is Honolulu International Airport (HNL), also in Usa Oahu Isl., 22 km (14 miles) away.

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Please note that some surf spot locations are approximate to protect their exact location while others are not shown at close zoom level.

Castles Beach Surf Forecasts:

Hourly Forecast

16 Day Forecast

Todays Surf Summary
Monday, 4 May 2026, 09:00 Local Time

m, °C	Monday 04
ft, °F	5AM	8AM	11AM	2PM
Wave (m)	ENE	ENE	ENE	ENE
Period (s)	6	8	8	8
Wind (km/h)
Wind State	cross- on	cross- on	cross- on	cross- on

What does Castles Beach look like?

Latest photos from Castles Beach. Upload your own or view all photos on the gallery page.

Credit: Kevin Cooper Credit: Kevin Cooper

Tides at Castles Beach

Current tide and informaton

For Kailua, 2 km from Castles Beach.

Next High Water: 04:51pm | 0.79m

Next Low Water: 09:01am | 0.08m

NEXT	IS AT (local time)	remaining
high tide
low tide

Castles Beach Sea Temperature

Sunny with pleasantly warm air temperatures (feeling like 23.0 °C once we account for wind), and similar sea temperatures (24.9 °C). Wear boardshorts or a shorty, or better still a thin summer wetsuit to keep the UV off.

Today, many surfers would wear a shorty.

Current Temp*: 24.9°C*ocean temperature recorded from satellite