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Surf Forecasts:

Number Fours surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 7 pm Wednesday 11 Mar 2026 HST
Forecast update in hr  min  s Forecast update imminent
Number Fours surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Number Fours sea temperature is
24.8° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Number Fours this week:

The surf forecast for Number Fours over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Mar 17) at 5PM. The primary swell is predicted to be 0.5m and 17s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Number Fours in the next 12 days are 3.5m 8s and forecast to arrive on Friday (Mar 13) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 7s period and expected on Wednesday (Mar 18) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5PM (Tue 17th Mar)1.5ft (0.5m) 17s
Best Surf 2AM (Wed 18th Mar)2.5ft (0.7m) 16s
Most Powerful11PM (Fri 13th Mar)11ft (3.5m) 8s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table

Short Range Forecast Heavy rain (total 157mm), heaviest during Fri night. Warm (max 24°C on Wed night, min 21°C on Thu afternoon). Winds increasing (light winds from the SSE on Thu afternoon, near gales from the SSW by Fri night).

Days 3-6 Weather Summary Heavy rain (total 52mm), heaviest during Sat night. Warm (max 24°C on Sat night, min 21°C on Mon night). Winds decreasing (strong winds from the SW on Sat night, calm by Mon night).

Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wed
18
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
2
2
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.9
ENE
0.9
ENE
0.9
ENE
0.4
SW
2
S
3
S
3.5
SSW
3
SW
3
SW
3
SW
2.5
WSW
1.2
S
0.6
S
0.5
E
0.5
E
0.4
E
0.4
S
0.5
S
0.7
S
0.8
S
0.8
S
Period(s) (?)8881768888810768881717161615
Wave
Graph
(?)Metric surfscale
Energy kJ (?)999289772951157138096497892212241262833332195140254322302
Wind
(km/h)
20
SSW
20
S
15
SSE
25
S
45
S
50
S
55
SSW
50
SW
45
SW
45
SW
40
SW
30
SW
30
SW
15
W
10
NW
5
SW
10
WSW
10
W
5
N
10
NE
20
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		ononononononcross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		crosscross-
off		glasscrosscross-
off		offcross-
off		cross-
off
High Tide
/ height (m)
11:56PM
0.51
12:13PM
0.14
12:47AM
0.53
1:03PM
0.17
1:27AM
0.56
1:41PM
0.22
2:01AM
0.57
2:15PM
0.27
2:33AM
0.57
2:51PM
0.33
3:04AM
0.55
3:28PM
0.39
3:35AM
0.52
4:07PM
0.45
Low Tide
/ height (m)
8:14AM
0.09
4:45PM
0.07
8:27AM
0.07
5:57PM
0.05
8:42AM
0.05
6:53PM
0.03
8:58AM
0.03
7:42PM
0.01
9:16AM
0.01
8:29PM
-0.01
9:36AM
-0.02
9:17PM
-0.01
9:58AM
-0.04
Thursday
12
Friday
13
Saturday
14
Sunday
15
Monday
16
Tuesday
17
Wed
18
Sunrise-6:41--6:41--6:41--6:39--6:39--6:37--6:37-
Sunset--6:38--6:39--6:39--6:39--6:40--6:40--6:40
thunderstorm
thunderstorm
thunderstorm
mod rain
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
light rain
cloud
light rain
light rain
mod rain
rain showers
clear
thunderstorm
Rain (mm)
63158161868716213464-5274-2
Temp. °C242423232322232423242424232323222222222323
Feels °C (?)242424221916171818202021212424242323252423
  • 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 Number Fours 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 Number Fours at:
surf-forecast.com

Information about the Number Fours Surf forecast

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

Number Fours is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.

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