Number Fours surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 7 pm Monday 07 Jul 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 normal for this time of year)


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 (Jul 08) at 8PM. The primary swell is predicted to be 2.5m and 8s period with a secondary swell of 0.4m and 16s. Another secondary swell of 0.3m and 18s is also forecast. 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 2.5m 8s and forecast to arrive on Tuesday (Jul 08) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Tue 8th Jul)8ft (2.5m) 8s
Best Surf 5AM (Mon 14th Jul)5ft (1.5m) 7s
Most Powerful 8PM (Tue 8th Jul)8ft (2.5m) 8s

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

Updates in  hr  min  s Forecast update imminent
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Sat
19
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
2.3
ENE
2.5
E
2.5
ENE
2.3
E
1.8
ENE
1.7
ENE
1.8
ENE
1.9
ENE
1.8
ENE
1.7
ENE
1.8
ENE
1.6
ENE
1.7
ENE
1.5
ENE
1.5
ENE
1.6
ENE
1.5
ENE
1.5
ENE
1.5
ENE
1.2
ENE
1.1
ENE
1.4
ENE
1.4
ENE
1.3
ENE
1.6
ENE
1.4
ENE
1.4
ENE
1.5
ENE
1.4
ENE
1.3
ENE
1.5
ENE
1.4
ENE
1.7
ENE
1.8
ENE
1.4
ENE
1.4
ENE
Period(s) (?)788877777777778888778888888888666766
Wave
Graph
(?)Metric surfscale
Energy (?)689830959821549412467589501457455432376317326365376361416281303390350373377342346388331299267220289348201204
Wind
(km/h)
40
ENE
40
ENE
40
ENE
35
ENE
35
ENE
40
ENE
30
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
25
E
35
ENE
35
ENE
25
ENE
25
ENE
30
ENE
25
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
20
ENE
30
ENE
30
ENE
25
ENE
30
ENE
30
ENE
30
ENE
35
ENE
30
ENE
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-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
1:58AM
0.16
3:19PM
0.68
2:44AM
0.17
3:54PM
0.71
3:29AM
0.18
4:28PM
0.72
4:14AM
0.19
5:03PM
0.72
5:03AM
0.21
5:37PM
0.70
5:56AM
0.23
6:12PM
0.66
6:56AM
0.27
6:47PM
0.60
8:02AM
0.32
7:23PM
0.52
9:14AM
0.39
8:02PM
0.43
10:27AM
0.47
8:45PM
0.34
11:35AM
0.55
9:43PM
0.26
12:35PM
0.63
Low Tide
/ height (m)
10:26PM
0.11
7:27AM
-0.02
10:56PM
0.09
8:07AM
-0.03
11:26PM
0.08
8:47AM
-0.04
11:56PM
0.06
9:28AM
-0.03
12:26AM
0.05
10:10AM
-0.00
12:57AM
0.03
10:57AM
0.04
1:27AM
0.02
11:49AM
0.09
1:59AM
0.01
12:55PM
0.16
2:32AM
0.00
2:23PM
0.23
3:07AM
-0.01
4:24PM
0.26
3:46AM
-0.02
6:43PM
0.23
4:31AM
-0.03
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Sat
19
Sunrise-5:54--5:54--5:56--5:56--5:56--5:56--5:56--5:58--5:58--5:58--5:58--5:58-
Sunset--7:16--7:16--7:16--7:16--7:15--7:15--7:15--7:15--7:15--7:15--7:15--7:15
part cloudclearclearpart cloudclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearclearpart cloudclearpart cloudpart cloudpart cloudpart cloudpart cloudpart cloudpart cloud
Rain (mm)
------------------------------------
Temp. °C242525242525242525242525252626252626252626252626252626252626252626252626
Feels °C (?)202020202221202221222121242424242323222524232323222323232424232322232324

Short Range Forecast: Mostly dry. Warm (max 25°C on Tue morning, min 24°C on Mon night). Mainly strong winds.

Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Sat morning, min 24°C on Thu night). Mainly fresh winds.

Days 6-9 Weather Summary Mostly dry. Warm (max 26°C on Mon morning, min 24°C on Sun night). Mainly fresh winds.

Long Range Forecast: Mostly dry. Warm (max 26°C on Thu morning, min 24°C on Wed night). Winds increasing (light winds from the ENE on Wed night, strong winds from the ENE by Fri afternoon).

  • 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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