Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 1 am 12 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 12 Jul 2026:

  • Best quality surf: Wednesday 15 Jul, 5AM (local time) - 2.5ft (0.7m), 17s period, SSW swell with cross-offshore winds.
  • Most powerful swell: Monday 13 Jul, 5AM (local time) - 7ft (2.2m), 8s period, ENE swell with 512 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 15 Jul, 5AM (local time) - 2.5ft (0.7m), 17s period with SSW swell.

Best Forecast Surf Conditions for Number Fours this week:

The surf forecast for Number Fours over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 15) at 5AM. The primary swell is predicted to be 0.7m and 17s period with a secondary swell of 1.3m 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 16 days are 2.2m 8s and forecast to arrive on Monday (Jul 13) at 5AM. 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 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 15th Jul)2.5ft (0.7m) 17s
Best Surf 5AM (Wed 15th Jul)2.5ft (0.7m) 17s
Most Powerful 5AM (Mon 13th Jul)7ft (2.2m) 8s

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


Alright, this is Rusty, and I’m looking at the next 16 days for Number Fours. Let’s be honest, it’s a bit of a tough stretch, but we’ve got a little flicker of light right at the very end.

Right now, the surf is a bit of a mess. We’ve got a solid 6 ft of swell showing up on Sunday morning, July 12th, but it’s coming from the ENE with a short, weak 8-second period. The wind is a strong 25 mph from the ENE, so it’s cross-off. It’s clean, but the energy is weak for the size, and the overall quality is poor. The water temp is a pretty standard 79°, so nothing unusual there for this time of year.

The whole first week is a bit of a grind. Monday, July 13th, is still bumpy with 6 ft swell and strong winds, and the energy drops. Tuesday sees a huge drop in size to 2 ft, and while the period jumps to 14 seconds, the wind is still a cross-off moderate breeze. The energy is way down. Wednesday through Saturday are all small, with the swell hovering around 2 ft to 3 ft, and the wind is a constant cross-off from the ENE. The combined energy never really gets going. Honestly, it’s not looking like a good time to paddle out.

There’s a small spike on Sunday, July 19th, with 4 ft of short-period E swell, but the wind is still blowing 19 mph, and the wave quality is poor. The energy is back up a bit, but it’s not enough to get excited about.

The second week is a bit of a mixed bag. The swell keeps jumping around, but Monday, July 20th, has a weird 2 ft swell with a 17-second period. That’s a very long period for such a tiny wave, so it’s a real tease. The energy is moderate. The wind is still cross-off, so it’s clean, but the size is just too small. The rest of the week into the 25th is all in the 5 ft to 6 ft range with short, 6-7 second periods and constant ENE wind. That’s not great for a reef break, and the energy is moderate. It’s a bit of a boring, onshore-feeling grind.

But here’s the one true standout. Finally, on Monday, July 27th, we see a change. The swell is only 3 ft, but it’s from the E with a nice 15-second period, and the wind drops to a gentle 9 mph from the ENE. That’s a gentle breeze, cross-off, which is clean. The combined energy is up, which is moderate, and the forecast is for “very good surf conditions” in the afternoon. It’s not huge, but with that long period and light wind, it’s going to be clean and have some shape. This is the best on offer in the whole 16 days, though it’s a long way off, so keep an eye on it.

The crowd at Number Fours can be a factor sometimes, so keep that in mind.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Light rain (total 4mm), mostly falling on Wed afternoon. Warm (max 26°C on Thu afternoon, min 24°C on Thu night). Winds increasing (light winds from the E on Wed night, fresh winds from the ENE by Fri morning).

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Saturday
18
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
1
1
2
1
0
0
1
0
2
0
1
0
0
0
0
0
0
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.9
ENE
8
1.9
ENE
8
1.9
ENE
8
1.8
ENE
8
0.8
SSW
15
1.5
ENE
7
0.7
SW
14
0.7
SW
14
0.6
SSW
13
0.7
SW
13
0.7
SSW
14
0.8
SSW
16
0.6
SSW
16
0.7
SSW
13
0.9
SSW
13
0.9
SSW
11
0.6
SSW
16
0.5
S
14
0.6
SSW
13
0.7
SSW
14
1.1
E
8
Wave Graph
Metric surfscale
Energy kJ
389
419
410
383
314
237
191
186
111
164
178
314
175
145
299
211
196
96
141
210
161
Wind (km/h)
40
ENE
40
ENE
35
ENE
35
ENE
30
ENE
20
NE
25
ENE
25
ENE
20
ENE
15
ESE
20
E
15
E
30
ENE
15
E
30
ENE
35
ENE
30
ENE
30
ENE
30
ENE
25
ENE
20
ENE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
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
7:44AM0.34m
7:11PM0.52m
Low Tide
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
12:46PM0.16m
2:15AM0.02m
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
part cloud
rain showers
rain showers
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:56
5:56
5:56
5:58
5:58
5:58
5:58
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:15
7:15
7:15
7:15
7:15
7:15
7:15
 mm
2
2
Temp °C
25
25
24
25
25
24
25
25
25
25
25
25
25
26
25
25
26
25
25
26
25
Feels °C
23
21
20
22
22
22
24
23
25
26
26
24
25
26
26
24
24
24
25
25
25
  • 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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