Turtle Bay surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 7 pm Saturday 17 Jan 2026 HST
Forecast update in hr  min  s Forecast update imminent
Turtle Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Turtle Bay sea temperature is
24.9° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Turtle Bay this week:

The surf forecast for Turtle Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jan 20) at 8AM. The primary swell is predicted to be 1.1m and 16s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Turtle Bay in the next 12 days are 2.5m 17s and forecast to arrive on Sunday (Jan 18) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Sunday (Jan 18) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Tue 20th Jan)3.5ft (1.1m) 16s
Best Surf11AM (Tue 20th Jan)5ft (1.6m) 16s
Most Powerful11AM (Sun 18th Jan)8ft (2.5m) 17s

Table - best surf conditions forecast for Turtle Bay over the next 12 days.

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 24°C on Mon morning, min 22°C on Sat night). Winds decreasing (fresh winds from the E on Sat night, light winds from the W by Tue afternoon).

Days 3-6 Weather Summary Heavy rain (total 30mm), heaviest during Thu morning. Warm (max 23°C on Tue night, min 19°C on Thu afternoon). Winds increasing (calm on Tue night, strong winds from the NNE by Thu morning).

Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Sat
24
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
3
4
2
1
2
1
4
3
4
2
0
1
0
2
0
0
0
0
1
1
Swell
Height Map
Wave Height (m) & direction (?)
1.5
N
2.5
NW
2.5
NW
2.2
NW
1.6
NW
1.3
NW
1.1
NW
1.6
NW
1.7
NW
1.6
NW
2
NW
2.2
NW
1.7
NW
1.5
NW
1.7
NW
1.2
NW
1.2
NNW
1.2
NNW
1.4
NNW
1.2
NNW
1.1
NNW
Period(s) (?)111716141313121614131514141312131111121111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)56636633544198393360933011941196834183619561058757888479343313557325260
Wind
(km/h)
30
E
30
ESE
25
E
30
ESE
25
E
25
ESE
20
ESE
10
SW
10
W
5
NNW
15
N
25
NNE
30
NE
45
NNE
20
ENE
25
NE
35
NE
30
ENE
30
ENE
20
E
20
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
on
glasscross-
on
cross-
on
crosscross-
on
crosscross-
on
crosscrosscrosscross-
off
cross-
off
High Tide
/ height (m)
3:23AM
0.80
1:36PM
0.36
3:48AM
0.80
2:19PM
0.37
4:12AM
0.78
3:06PM
0.39
4:34AM
0.75
3:58PM
0.40
4:53AM
0.71
5:00PM
0.41
5:10AM
0.66
6:18PM
0.44
5:22AM
0.60
Low Tide
/ height (m)
10:33AM
0.32
8:03PM
0.01
10:49AM
0.31
8:35PM
0.04
11:08AM
0.29
9:06PM
0.08
11:28AM
0.27
9:39PM
0.15
11:50AM
0.24
10:14PM
0.24
12:16PM
0.21
10:54PM
0.34
12:48PM
0.18
Sunday
18
Monday
19
Tuesday
20
Wednesday
21
Thursday
22
Friday
23
Sat
24
Sunrise-7:11--7:11--7:11--7:11--7:11--7:11--7:11-
Sunset--6:12--6:12--6:13--6:14--6:14--6:15--6:15
clear
part cloud
part cloud
cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
cloud
mod rain
mod rain
light rain
rain showers
rain showers
rain showers
rain showers
thunderstorm
thunderstorm
Rain (mm)
------------665526121
Temp. °C222323232424232424232323222019212222222323
Feels °C (?)161818192021212422232222191515201818182222
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Turtle Bay Surf forecast

The above surf forecast table for Turtle Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Turtle Bay can be found by selecting the local surf guide option on the grey menu. Our Turtle Bay surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Turtle Bay) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Turtle Bay may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Turtle Bay is 23 km (14 miles) from Wahiawa. If you plan a vacation in Oahu, look for hotels and other accommodation in Wahiawa. Wahiawa has rooms for a wide range of budgets as well as car hire and transport links.

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