Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 pm 22 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.5° C
0.2° 

Number Fours surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Number Fours surf forecast from 23 Jul 2026:

  • Most powerful swell: Tuesday 28 Jul, 8PM (local time) - 7.5ft (2.3m), 13s period, ENE swell with 1,677 kJ wave energy.

Best Forecast Surf Conditions for Number Fours this week:

The most powerful waves expected at Number Fours in the next 16 days are 2.3m 13s and forecast to arrive on Tuesday (Jul 28) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 8s period and expected on Saturday (Jul 25) at 11PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 8PM (Tue 28th Jul)7.5ft (2.3m) 13s

Table - best surf conditions forecast for Number Fours over the next 16 days.


The Lowdown

Alright, Rusty here, let’s talk about Number Fours.

First up, the water temp is hanging around 80°, which is pretty much normal for this time of year, so no surprises there.

Honestly, the outlook starts off a bit of a slow burn. We’ve got some small, choppy, cross-off conditions through the first few days. Wednesday the 22nd through Friday the 24th is mostly small stuff, with a bit of a bump in size on the 24th – we’re looking at waist to chest high waves from the ENE, but the period is short and the wind is a cross-off breeze. The combined energy is moderate (846 to 1035), but the quality just isn’t there for a proper paddle. It’s more of a kite session kind of setup.

Saturday the 25th sees a bit of a mix: a morning of 6ft ENE windswell, but then the afternoon brings a cleaner 3ft groundswell from the SSW with a very long 18-second period. That’s a proper long-period pulse, but it’s pretty tiny. The energy jumps up (1101), but the size is too small to get excited about.

The real standout window opens up on Tuesday the 29th of July. That’s the day. The wind drops right out, turning offshore from the north in the afternoon, and the swell hits 7ft from the ENE with a 12-second period. The combined energy is strong (1405 to 1466) and the conditions are clean. That’s a proper, powerful, well-shaped wave for experienced surfers. If you’re up for a solid, challenging session, that’s your morning and afternoon.

The days around that are a bit of a mixed bag. Wednesday the 30th sees the wind swing onshore, messing up the quality, and the energy drops off. Then from Friday the 31st of July right through to the start of August, the wind howls again. The 1st and 2nd of August pump up to 8ft but with a terrible 7-8 second period and strong cross-off wind. It’s big, messy, and not surfable. The energy is moderate to strong (810 to 983), but the quality is poor.

Then we get a bit of a lull. The 3rd and 4th of August offer some cleaner 3ft to 4ft groundswell from the east with a 15-16 second period. The energy is moderate (1032 to 895). It’s clean, but the size is very small. Could be a grovel board session for the keen.

The 5th of August sees a bit more size, with 5ft from the ENE and a 12-second period, but the wind is still cross-off and the energy is moderate. It’s a better prospect than the immediate days before, but nothing like the 29th.

The best on offer is absolutely the 29th of July – Tuesday morning and afternoon. That’s a solid 7ft groundswell, clean offshore winds, and long-period energy. It’s a proper, heavy, top-shelf session for the experienced crew. The 25th of July (Saturday) afternoon is a distant second, with a tiny but super-long-period pulse that would be great for a point or reef, but it’s small.

Rusty.

Short Range Forecast

Some drizzle, heaviest during Fri morning. Warm (max 26°C on Fri afternoon, min 24°C on Thu morning). Mainly strong winds.

Days 5-7 Weather Summary

Some drizzle, heaviest during Sat night. Warm (max 26°C on Sat afternoon, min 24°C on Sat night). Mainly fresh winds.

Wed
22
Thursday
23
Friday
24
Saturday
25
Sunday
26
Monday
27
Tuesday
28
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
1
1
0
1
1
1
2
2
1
2
2
2
2
1
1
2
3
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.6
SSW
23
0.6
SSW
22
2.1
ENE
7
2
ENE
7
0.9
SSW
18
2.2
ENE
7
2
ENE
7
2.1
ENE
7
1.8
ENE
8
0.9
SSW
18
0.9
SSW
18
1.9
ENE
8
1.1
E
15
1.2
E
14
1.3
E
14
1.4
E
13
2.1
ENE
13
2
ENE
13
2.2
ENE
13
2.2
ENE
13
Wave Graph
Metric surfscale
Energy kJ
426
363
412
395
464
526
394
482
392
572
547
469
520
585
631
680
1467
1359
1497
1599
Wind (km/h)
35
ENE
30
ENE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
25
ENE
30
NE
20
NE
Wind State
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
10:06PM0.22m
1:02PM0.59m
11:46PM0.19m
1:44PM0.62m
00:59AM0.18m
2:22PM0.66m
1:51AM0.19m
2:56PM0.68m
2:32AM0.21m
3:29PM0.70m
3:10AM0.23m
3:59PM0.70m
3:49AM0.25m
Low Tide
8:25PM0.21m
9:13PM0.17m
5:34AM0.05m
9:41PM0.14m
6:23AM0.04m
10:05PM0.12m
7:08AM0.02m
10:27PM0.11m
7:51AM0.01m
10:49PM0.10m
8:31AM0.01m
11:11PM0.09m
clear
part cloud
clear
clear
clear
rain showers
clear
clear
clear
clear
rain showers
clear
clear
part cloud
part cloud
clear
part cloud
clear
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:01
6:01
6:01
6:01
6:01
6:03
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:14
7:14
7:13
7:13
7:13
7:12
7:12
 mm
1
1
Temp °C
25
25
25
25
25
25
26
25
25
26
25
25
25
25
25
25
25
25
26
25
Feels °C
21
23
21
21
22
21
22
23
23
23
23
22
22
22
22
22
23
24
25
24
  • 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 16 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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