Waimanalo surf break

Waimanalo surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 7 pm Tuesday 09 Dec 2025 HST
Forecast update in hr  min  s Forecast update imminent
Waimanalo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimanalo sea temperature is
25.7° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Waimanalo this week:

The surf forecast for Waimanalo over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Dec 10) at 5AM. The primary swell is predicted to be 1.8m and 16s period with a secondary swell of 0.7m and 8s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Waimanalo in the next 12 days are 1.8m 16s and forecast to arrive on Wednesday (Dec 10) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Monday (Dec 15) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 10th Dec)6ft (1.8m) 16s
Best Surf 5AM (Wed 10th Dec)6ft (1.8m) 16s
Most Powerful 5AM (Wed 10th Dec)6ft (1.8m) 16s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Light rain (total 5mm), mostly falling on Thu morning. Warm (max 25°C on Wed morning, min 22°C on Thu morning). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 33mm), heaviest during Mon afternoon. Warm (max 25°C on Sat morning, min 21°C on Mon afternoon). Mainly fresh winds.

Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tue
16
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
3
4
4
3
1
1
2
0
2
1
1
2
1
1
3
2
2
2
1
1
0
Swell
Height Map
Wave Height (m) & direction (?)
1.7
NW
1.8
NW
1.7
NW
1.4
NW
1.7
NNW
1.7
NNW
1.3
NNW
0.9
NW
1
N
1.3
N
1.3
NNW
1.2
N
0.9
N
0.7
N
1.3
NW
1.6
NW
1.1
N
1.2
N
1.4
N
1.2
N
1
N
Period(s) (?)161514131312121112111111101014131211131312
Wave
Graph
(?)Metric surfscale
Energy kJ (?)15801453118770091478742117927941040032615889639841347357683480309
Wind
(km/h)
5
SE
15
SW
15
WSW
15
WSW
15
NNW
10
N
10
NNE
15
ENE
10
SE
15
SSW
20
SSW
20
SSW
10
WSW
10
S
10
SSW
20
S
30
SSW
25
SSW
30
S
30
SSW
35
SSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crossoffoffoffcross-
on
cross-
on
cross-
on
cross-
on
cross-
off
cross-
off
cross-
off
offoffcross-
off
cross-
off
cross-
off
offoffcross-
off
cross-
off
cross-
off
High Tide
/ height (m)
7:42AM
0.58
8:23PM
0.22
8:20AM
0.52
11:00PM
0.30
8:52AM
0.47
12:11AM
0.39
9:17AM
0.42
12:51AM
0.47
9:40AM
0.38
1:22AM
0.54
10:07AM
0.35
1:49AM
0.59
10:42AM
0.33
Low Tide
/ height (m)
11:29PM
0.06
3:51PM
0.16
12:24AM
0.15
4:12PM
0.12
1:52AM
0.23
4:32PM
0.08
4:02AM
0.29
4:53PM
0.04
6:01AM
0.30
5:14PM
0.01
7:23AM
0.29
5:39PM
-0.03
8:16AM
0.27
6:06PM
-0.05
Wednesday
10
Thursday
11
Friday
12
Saturday
13
Sunday
14
Monday
15
Tue
16
Sunrise-6:56--6:58--6:58--6:58--6:58--7:00--7:01-
Sunset--5:49--5:49--5:50--5:50--5:50--5:51--5:51
clear
clear
clear
clear
rain showers
light rain
part cloud
part cloud
clear
clear
clear
clear
thunderstorm
clear
thunderstorm
thunderstorm
mod rain
heavy rain
rain showers
thunderstorm
thunderstorm
Rain (mm)
----23------1-15917612
Temp. °C242525242322232324242525242525252422242525
Feels °C (?)272524242423242325242524252726272221222422
  • 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 Waimanalo Surf forecast

The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.

Waimanalo is 7 km (4 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.

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