Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Number Fours Surf Forecast and Surf Report

Issued: 7 pm 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 12 Jul 2026:

  • Best quality surf: Wednesday 15 Jul, 5AM (local time) - 2.5ft (0.7m), 17s period, SW swell with cross-offshore winds.
  • Most powerful swell: Monday 13 Jul, 5AM (local time) - 7ft (2.2m), 7s period, ENE swell with 498 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 15 Jul, 5AM (local time) - 2.5ft (0.7m), 17s period with SW 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 7s 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 2PM.

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) 7s

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


Alright folks, Rusty here. Let’s have a look at what Number Fours has in store for us.

First up, the water temp is sitting at 79°F which is bang on average for this time of year, so no surprises there. The opening stretch though? It’s a bit of a tough one. The first few days are all cross-off wind and messy, short-period windswell that’s just not coming together. Saturday the 11th and Sunday the 12th are a no-go – the wind is howling at 22-25 mph and the swell is a jumbled 6ft to 7ft of short-period junk. The combined energy is moderate (674 to 854), but it’s all wind and no shape. The score is a big fat zero.

Monday the 13th and Tuesday the 14th are still nothing to write home about. The swell drops right off to 2ft on Tuesday, and while the period gets long (14 seconds) from the SW, the energy is weak (308) and the wind is still cross-off. It’s a paddling session, not a surfing one. Wednesday the 15th through Friday the 18th is a similar story – small, weak, or short-period. The wind is relentless out of the ENE, and the wave heights are mostly under 3ft. The energy is low (175-411), and the scores are zeros.

We finally get a bit of a pulse around the 20th and 21st. Monday the 20th has a 3ft S swell with a 16-second period, giving us moderate energy (631), but the wind is still a fresh 19-22 mph cross-off. It’s a step up but still only marginal. The real interest starts on the 21st of July: a 5ft to 6ft ENE windswell picks up, combined energy is moderate (675-699), and the wind backs off a little to 12 mph. The score creeps to a 2, which is the best we’ve seen, but it’s still a pretty average offering.

Now, the true standout is the last two days of the forecast. On Thursday the 23rd, we get a proper long-period S/SW groundswell with a 20-21 second period. The combined energy jumps to a strong 996-1088. The wave height is only 3ft, but that’s a real, clean, long-period swell. The wind is a moderate 12-16 mph cross-off, and the score is a 2. This is the best quality of the whole run. It’s a reef break, so that long period will wrap in nicely. But don’t get too excited about the size – it’s not a big day.

The absolute best on offer is Sunday the 26th. That morning, we have a 5ft S swell with a 19-second period, and the combined energy hits a very strong 1505. The wind is a moderate 16 mph cross-off. The score is a 3, the highest in the whole forecast. That’s the one to circle. It’s a long-range call, so don’t book the week off yet, but it’s the only period that looks like it could actually deliver a proper, clean, reef-breaking wave. Saturday the 25th and Sunday the 26th are the only two days that look genuinely worth a look.

Bottom line: the first two weeks are a grind. The 26th is the best bet, but it’s a long way off. Keep an eye on it.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Tue afternoon, min 24°C on Sat night). Mainly strong winds.

Days 5-7 Weather Summary

Light rain (total 5mm), mostly falling on Tue night. Warm (max 26°C on Wed afternoon, min 24°C on Tue night). Winds increasing (light winds from the ENE on Wed night, fresh winds from the ENE by Fri afternoon).

Sunday
12
Monday
13
Tuesday
14
Wednesday
15
Thursday
16
Friday
17
Sat
18
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Rating
(10 max)
0
0
0
1
1
1
1
1
0
0
1
1
2
0
1
0
0
0
0
0
0
Swell
Height Map
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
7
0.9
SW
16
1.9
ENE
8
0.9
SW
16
1.8
ENE
8
1.7
ENE
8
1.5
ENE
7
1.5
ENE
8
0.7
SW
14
0.8
E
8
0.7
SW
13
0.7
SW
14
0.8
SSW
16
0.6
SSW
16
0.6
SSW
17
0.7
SW
14
0.5
SW
12
0.6
SSW
16
1.3
ENE
6
1.1
ENE
6
1.3
ENE
7
Wave Graph
Metric surfscale
Energy kJ
379
397
419
393
383
322
231
257
186
71
164
206
314
175
195
211
67
196
125
92
160
Wind (km/h)
35
ENE
40
ENE
40
ENE
35
ENE
35
ENE
30
ENE
25
ENE
25
ENE
25
ENE
20
ENE
20
ENE
20
ENE
15
ENE
25
ENE
25
ENE
30
ENE
35
ENE
35
ENE
30
ENE
30
ENE
30
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-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
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
7:44AM0.34m
7:11PM0.52m
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
12:46PM0.16m
part cloud
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
rain showers
rain showers
clear
rain showers
part cloud
part cloud
clear
clear
clear
part cloud
part cloud
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>
7:16
7:15
7:15
7:15
7:15
7:15
7:15
7:15
 mm
3
1
1
Temp °C
25
25
25
24
25
25
24
25
26
25
25
26
25
26
26
25
25
25
25
25
26
Feels °C
23
23
21
20
22
22
22
23
24
24
25
26
25
25
25
23
23
22
23
24
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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