Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 am 11 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.3° 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 11 Jul 2026:

  • Most powerful swell: Sunday 12 Jul, 11AM (local time) - 7ft (2.1m), 7s period, ENE swell with 456 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 2.1m 7s and forecast to arrive on Sunday (Jul 12) 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 1.4m 8s period and expected on Tuesday (Jul 14) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful11AM (Sun 12th Jul)7ft (2.1m) 7s

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


Alright, folks, Rusty here. Let's break down the next 16 days for Number Fours. I’ll be honest, this is a rough patch. The first week and a half is mostly a bust. The wind is stuck from the ENE, blowing cross-off, so the surface is clean, but the swell is just not showing up. The water is about 79°, which is normal for this time of year, so at least the water feels fine.

The best we can say for the first week is the Monday morning and afternoon of July 13th. The swell is 6ft to 6ft from the ENE, with a short, punchy 8-second period. The combined energy is moderate (636 to 687). It’s still marginal, and the direction is cross-off, so it won’t be a classic Number Fours session. This is only for the die-hards.

Then we hit a flat spell. From July 14th through July 19th, the swell is tiny. The energy drops off a cliff (down to 225), and the swell is mostly from the SW with a long period (13-17 seconds), but it’s only 2ft to 2ft. That’s a long wait for a knee-high wave. The wind stays clean, but there’s no power. A real blank stretch.

Things start to look a little better around July 20th. The combined energy builds, hitting 853 on the Monday afternoon of July 20th, with a 3ft swell from the E at 18 seconds. That’s a long-period groundswell, which is good for a reef like Number Fours. The wind is still cross-off from the ENE at 22 mph, keeping it clean. The energy stays up through the 21st and 22nd of July, with the 21st showing the best: a 3ft swell from the E at 16 seconds, with energy hitting 887 (moderate). The wind eases a bit on the 22nd to a moderate breeze, and the swell is still 2ft from the E. This is the standout period. The waves won’t be big, but the quality should be there. It’s a good option for intermediates, and crowds are only sometimes an issue, so you might get a few waves to yourself.

The end of the window, on July 25th and 26th, the swell picks up to 5ft to 6ft, but it’s short-period, windswell from the ENE (6-7 seconds). The energy is moderate (426 to 499), but that short period will make it choppy and messy. The wind is still cross-off, but it’s a fresh breeze. This is more of a hassle than a highlight.

So, the bottom line: This is a long wait for a small window. The best bet is July 20th to the 22nd. That’s where the long-period east swell meets clean conditions. It’s not a world-beater, but it’s the only real surf on offer. For the rest, you’re better off doing something else.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Sat morning, min 24°C on Sat night). Winds decreasing (strong winds from the ENE on Sun afternoon, light winds from the ENE by Mon night).

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Wed morning. Warm (max 26°C on Wed afternoon, min 24°C on Tue morning). Winds increasing (light winds from the E on Wed night, fresh winds from the ENE by Thu night).

Saturday
11
Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
1
1
1
2
0
0
0
1
1
1
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
ENE
7
1.8
ENE
7
1.9
ENE
7
2.1
ENE
7
1.9
ENE
8
0.9
SW
16
1.8
ENE
8
1.7
ENE
8
1.5
ENE
7
0.7
SW
14
0.7
SW
14
0.7
E
7
0.7
SW
13
0.7
SW
14
0.8
SSW
16
0.6
SSW
16
0.6
SSW
17
0.7
SSW
14
0.5
SW
16
0.6
SSW
16
0.6
SSW
14
Wave Graph
Metric surfscale
Energy kJ
417
316
339
456
419
393
373
339
237
191
186
53
164
206
314
175
195
183
125
196
147
Wind (km/h)
40
ENE
35
ENE
40
ENE
40
ENE
35
ENE
35
ENE
35
ENE
35
ENE
20
NE
25
ENE
25
ENE
20
ENE
15
E
15
E
10
E
30
ENE
30
ENE
40
ENE
35
ENE
35
ENE
35
ENE
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
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
2:24PM0.76m
1:50AM0.16m
3:11PM0.80m
2:52AM0.17m
3:56PM0.82m
3:49AM0.19m
4:39PM0.80m
4:45AM0.22m
5:20PM0.76m
5:41AM0.26m
5:59PM0.69m
6:41AM0.30m
6:36PM0.61m
Low Tide
10:04PM0.07m
7:21AM-0.09m
10:45PM0.04m
8:13AM-0.09m
11:23PM0.02m
9:06AM-0.08m
11:59PM0.01m
9:57AM-0.04m
00:34AM0.01m
10:49AM0.01m
1:08AM0.01m
11:44AM0.08m
1:42AM0.01m
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
clear
part cloud
part cloud
clear
part cloud
rain showers
rain showers
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
5:56
5:58
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:16
7:15
7:15
7:15
7:15
7:15
7:15
 mm
1
1
Temp °C
25
25
25
25
25
25
25
25
24
25
25
25
25
26
25
26
26
25
25
25
25
Feels °C
23
22
23
22
21
23
22
22
22
23
23
25
26
26
25
25
24
23
23
22
23
  • Map Icons:
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  • 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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