Number Fours surfForecast / HAW – Oahu / USA

information circle12 Day Weather and Surf, issued 7 pm Tuesday 01 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
26.2° 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 Wednesday (Jul 02) at 2AM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.6m and 7s. 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 3.0m 8s and forecast to arrive on Monday (Jul 07) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Wednesday (Jul 02) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Wed 2nd Jul)1.5ft (0.5m) 13s
Best Surf 5AM (Wed 2nd Jul)3.5ft (1.0m) 7s
Most Powerful 5PM (Mon 7th Jul)10ft (3.0m) 8s

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

Updates in  hr  min  s Forecast update imminent
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sun
13
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.5
S
1.1
ENE
0.9
ENE
0.5
S
1.1
ENE
1.1
ENE
0.6
S
1.7
ENE
1.6
ENE
1.7
ENE
2
ENE
1.9
ENE
1.8
ENE
2.1
ENE
1.8
ENE
2
ENE
2.5
E
3
ENE
2.5
ENE
2.4
ENE
2.3
ENE
2.1
ENE
2
ENE
2.2
ENE
1.9
ENE
1.9
ENE
1.7
ENE
1.8
ENE
1.7
ENE
1.8
ENE
1.8
ENE
1.7
ENE
1.7
ENE
1.5
ENE
1.6
ENE
1.7
ENE
Period(s) (?)137712661266777777788888788888888777777
Wave
Graph
(?)Metric surfscale
Energy (?)1342241971292862453104475265485686155345664745558301058832711719657649708588609531586551532489411466400534620
Wind
(km/h)
20
ENE
25
ENE
25
ENE
25
ENE
30
ENE
35
ENE
25
ENE
40
ENE
35
ENE
35
ENE
30
ENE
40
ENE
35
ENE
30
ENE
35
ENE
35
ENE
40
ENE
45
ENE
35
ENE
40
ENE
40
ENE
30
ENE
35
ENE
35
ENE
35
ENE
35
ENE
35
ENE
30
ENE
30
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
30
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)
8:36PM
0.42
11:10AM
0.37
9:14PM
0.34
12:04PM
0.44
9:59PM
0.27
12:50PM
0.50
10:57PM
0.22
1:30PM
0.56
12:04AM
0.19
2:08PM
0.61
1:06AM
0.17
2:44PM
0.65
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
Low Tide
/ height (m)
3:55AM
0.02
4:28PM
0.25
4:25AM
0.02
6:33PM
0.24
4:56AM
0.02
8:13PM
0.20
5:30AM
0.02
9:14PM
0.16
6:07AM
0.00
9:54PM
0.13
6:46AM
-0.01
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
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Saturday
12
Sun
13
Sunrise-5:52--5:52--5:52--5:54--5:54--5:54--5:54--5:54--5:56--5:56--5:56--5:56-
Sunset--7:16--7:16--7:16--7:16--7:16--7:16--7:16--7:16--7:16--7:16--7:15--7:15
clearrain showersclearclearclearclearrain showerspart cloudclearpart cloudpart cloudclearclearclearclearclearclearclearclearclearclearrain showersclearclearpart cloudpart cloudpart cloudclearpart cloudclearpart cloudclearclearclearclearclear
Rain (mm)
-2----1--------------1--------------
Temp. °C252525242525252525242525242525252525242525242525242525242525252525242525
Feels °C (?)232323232322232021212221202221222120202120212222212222212322232222212222

Short Range Forecast: Light rain (total 3mm), mostly falling on Wed morning. Warm (max 25°C on Tue night, min 24°C on Tue night). Winds increasing (light winds from the ENE on Tue night, strong winds from the ENE by Fri morning).

Days 3-6 Weather Summary Mostly dry. Warm (max 25°C on Sat morning, min 24°C on Fri night). Mainly strong winds.

Days 6-9 Weather Summary Some drizzle, heaviest during Tue night. Warm (max 25°C on Tue morning, min 24°C on Mon night). Mainly strong winds.

Long Range Forecast: Mostly dry. Warm (max 25°C on Fri morning, min 24°C on Thu night). Mainly fresh winds.

  • 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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