Number Fours surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 7 am Saturday 06 Dec 2025 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
26.1° 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 Saturday (Dec 06) at 2PM. The primary swell is predicted to be 1.1m and 8s 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 1.1m 8s and forecast to arrive on Sunday (Dec 07) 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 1.5m 10s period and expected on Saturday (Dec 13) at 2AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2PM (Sat 6th Dec)3.5ft (1.1m) 8s
Best Surf 2PM (Sat 6th Dec)3.5ft (1.1m) 8s
Most Powerful11AM (Sun 7th Dec)3.5ft (1.1m) 8s

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

Updates in  hr  min  s Forecast update imminent

Short Range Forecast Mostly dry. Warm (max 25°C on Sat morning, min 23°C on Mon morning). Winds decreasing (fresh winds from the ENE on Mon morning, light winds from the ENE by Mon night).

Days 3-6 Weather Summary Light rain (total 4mm), mostly falling on Thu night. Warm (max 25°C on Wed afternoon, min 22°C on Thu night). Wind will be generally light.

Saturday
06
Sunday
07
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
1
0
0
1
0
1
1
0
0
0
0
0
1
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
1.2
E
1
E
1
E
1.1
ENE
1.1
ENE
1.1
ENE
1.1
ENE
0.9
ENE
0.7
ENE
0.9
ENE
0.8
ENE
0.7
ENE
0.8
E
0.8
E
0.4
SSW
0.5
SSW
0.4
SSW
0.7
E
0.7
E
0.6
E
0.6
E
Period(s) (?)888888888888881514148888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)163115121167167155147102609675617485721207461634849
Wind
(km/h)
20
E
20
ENE
20
ENE
25
ENE
30
ENE
20
ENE
30
ENE
25
ENE
10
ENE
10
ESE
5
ESE
0
SSE
10
SSW
15
SW
10
SSW
15
SW
15
WSW
20
N
25
NNE
30
NNE
25
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
crossglassglasscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
offcross-
off
cross-
off
cross-
off
High Tide
/ height (m)
5:08PM
0.16
6:06AM
0.80
6:16PM
0.16
6:54AM
0.74
7:38PM
0.18
7:42AM
0.67
9:10PM
0.22
8:30AM
0.59
10:38PM
0.29
9:17AM
0.51
11:45PM
0.37
10:05AM
0.43
12:34AM
0.44
Low Tide
/ height (m)
1:02PM
0.05
10:13PM
-0.04
1:56PM
0.05
11:02PM
0.02
2:46PM
0.04
11:56PM
0.09
3:32PM
0.04
1:03AM
0.16
4:13PM
0.03
2:35AM
0.23
4:48PM
0.03
4:29AM
0.27
5:18PM
0.03
Saturday
06
Sunday
07
Monday
08
Tuesday
09
Wednesday
10
Thursday
11
Friday
12
Sunrise6:54--6:56--6:56--6:56--6:56--6:58--6:58--
Sunset-5:49--5:49--5:49--5:49--5:50--5:50--5:50-
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
rain showers
part cloud
part cloud
part cloud
Rain (mm)
-----------------4---
Temp. °C252524252524242424242424242524242524222322
Feels °C (?)252623232322212123252527252525232424191918
  • 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 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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