Number Fours Surf Break

Lat Long: 21.28° N 157.83° W

Issued: 1 am 05 Jul 2026 (local time)

Forecast update in  hr  min

Today's Number Fours sea temperature is
26.6° C

Slightly warmer than usual

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 5 Jul 2026:

  • Most powerful swell: Saturday 11 Jul, 2AM (local time) - 8ft (2.5m), 8s period, ENE swell with 728 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 2.5m 8s and forecast to arrive on Saturday (Jul 11) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 14s period and expected on Saturday (Jul 11) at 2PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Sat 11th Jul)8ft (2.5m) 8s

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


Updates in  hr  min  s Forecast update imminent

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

Right off the bat, I gotta be straight with you – this is a tough stretch. We’re looking at a solid 16-day window, but the first week is a write-off for any decent paddle surfing. The wind is locked in from the ENE at 19-25 mph, blowing cross-off. That’s not the kiss of death for a reef setup, but the swell is a messy, short-period 7 ft - 8 ft windswell from the ENE, with combined energy in the moderate range (around 790-961). The swell direction is wrong for this spot; it wants an SSE swell to really work. The water temp is sitting at 80°, which is about average for this time of year, so that’s one thing we don’t have to worry about.

We’ve got a solid 7-day gap of poor conditions before anything even looks marginal. The real action, if you can call it that, doesn’t start until the second week.

Now, the highlight? It’s the morning of Sunday, July 12th. That morning we finally see a switch. The wind drops to a still-strong 19 mph from the ENE, still cross-off, but the swell changes. We get a 3 ft groundswell from the SW with a long period of 16 seconds and combined energy of 758 (moderate). That’s the best direction we’ve seen for the reef. The waves will have that proper groundswell shape and energy, giving you long, clean lines. The period is long, so expect bigger gaps between sets, making the paddle out easier. But be warned, it’s still a small swell, so it’s not going to be pumping. Crowds are possible here, so don’t expect a solo session.

Monday, July 13th morning offers a similar look: a 3 ft, 15-second SW groundswell (671 energy), but with a few more clouds and the same fresh breeze. It’s a decent backup if you miss the Sunday morning window.

Beyond that, the rest of the second week slides back into that same old ENE windswell pattern, with heights between 5 ft and 6 ft, short periods of 7-8 seconds, and combined energy dropping into the weak to moderate range (232-533). The wind stays cross-off from the ENE, but it’s just not the right swell for the spot. On Thursday, July 16th, the wind does ease to a moderate 12 mph, which is a positive, but the swell is still that short-period ENE stuff. It’s marginal at best.

So, to sum it up: Number Fours has one real standout session, and that’s the morning of July 12th. Nail that window. The rest of the 16 days is a long grind of onshore, short-period slop. If you’re a kite surfer, that cross-off wind and consistent 7 ft+ swell in the first week will look interesting, but for the paddle crew, it’s a waiting game.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Sun morning, min 24°C on Sun morning). Mainly strong winds.

Days 4-6 Weather Summary

Some drizzle, heaviest during Fri night. Warm (max 25°C on Wed morning, min 24°C on Wed morning). Mainly strong winds.

Sunday
5
Monday
6
Tuesday
7
Wednesday
8
Thursday
9
Friday
10
Saturday
11
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
1
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.8
SSW
18
0.8
SSW
18
0.9
SSW
16
2.2
ENE
7
2.2
ENE
8
2.2
ENE
7
2.1
ENE
8
2.3
ENE
8
2.5
ENE
8
2
ENE
8
2.1
ENE
7
2.1
ENE
7
1.9
ENE
8
1.7
ENE
7
1.9
ENE
7
2
ENE
8
2.2
ENE
8
2.5
ENE
8
2.1
ENE
8
2
ENE
8
2.1
ENE
8
Wave Graph
Metric surfscale
Energy kJ
418
408
457
503
551
542
501
576
725
452
469
468
411
327
400
428
531
728
501
447
469
Wind (km/h)
35
ENE
35
ENE
35
ENE
40
ENE
35
ENE
35
ENE
35
ENE
40
ENE
40
ENE
40
ENE
40
ENE
35
ENE
40
ENE
40
ENE
30
ENE
35
ENE
40
ENE
40
ENE
35
ENE
35
NE
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
8:31AM0.28m
7:40PM0.49m
9:42AM0.35m
8:17PM0.41m
10:50AM0.43m
9:01PM0.34m
11:51AM0.52m
10:00PM0.26m
12:45PM0.61m
11:18PM0.20m
1:36PM0.69m
00:40AM0.17m
2:24PM0.76m
1:50AM0.16m
Low Tide
1:05PM0.17m
2:56AM0.01m
2:35PM0.23m
3:29AM-0.00m
4:35PM0.25m
4:06AM-0.02m
6:43PM0.23m
4:48AM-0.04m
8:17PM0.17m
5:36AM-0.06m
9:18PM0.12m
6:28AM-0.08m
10:04PM0.07m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
part cloud
part cloud
rain showers
part cloud
clear
part cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
5:54
5:54
5:54
5:54
5:54
5:56
5:56
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:16
7:16
7:16
7:16
7:16
7:16
7:16
 mm
1
Temp °C
25
25
24
25
25
24
25
25
24
25
25
24
25
25
25
25
25
25
25
25
24
Feels °C
22
21
21
21
20
20
21
21
20
21
21
20
22
21
24
24
22
23
22
22
21
Swell 1
Height (m)
Direction
Period (s)
0.8
SSW
18
0.8
SSW
18
0.9
SSW
16
0.8
SSW
16
0.9
SSW
15
0.8
SSW
15
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.7
SSW
13
0.6
S
13
0.6
S
12
0.6
S
12
0.5
S
12
0.5
S
12
0.4
SSW
11
0.5
SW
19
0.6
SSW
18
0.7
SW
18
0.8
SSW
17
Energy kJ
418
408
457
337
402
284
280
273
250
189
187
125
112
110
75
71
41
184
221
316
386
Swell 2
Height (m)
Direction
Period (s)
0.6
SSW
14
0.4
SW
14
0.3
SSW
13
0.2
SSE
9
0.2
SSE
9
0.2
SSE
8
0.2
SSE
10
0.1
SE
8
0.2
SSE
9
0.1
SE
9
0.2
SSE
8
0.2
W
15
0.2
SSE
8
0.2
W
14
0.2
W
13
0.2
W
13
0.4
SW
21
0.4
S
12
0.4
S
12
0.4
W
14
0.4
W
13
Energy kJ
138
51
34
8
8
7
9
3
8
3
7
17
6
15
13
13
109
43
44
62
55
Swell 3
Height (m)
Direction
Period (s)
0.2
SSE
11
0.2
SSW
11
0.2
SSE
10
0.2
SSW
13
0.1
W
10
0.1
NW
9
0.1
NW
9
0.1
S
10
0.1
W
18
0.1
S
18
0.1
S
10
0.2
S
16
0.2
SSE
5
0.2
W
16
0.2
W
15
0.3
S
13
0.4
W
13
0.4
W
14
0.4
S
12
0.3
S
11
Energy kJ
11
11
9
17
2
3
3
2
6
6
2
21
3
20
17
31
55
60
43
23
Wind waves
Height (m)
Direction
Period (s)
1.6
ENE
8
1.9
ENE
7
1.8
ENE
7
2.2
ENE
7
2.2
ENE
8
2.2
ENE
7
2.1
ENE
8
2.3
ENE
8
2.5
ENE
8
2
ENE
8
2.1
ENE
7
2.1
ENE
7
1.9
ENE
8
1.7
ENE
7
1.9
ENE
7
2
ENE
8
2.2
ENE
8
2.5
ENE
8
2.1
ENE
8
2
ENE
8
2.1
ENE
8
Energy kJ
294
376
316
503
551
542
501
576
725
452
469
468
411
327
400
428
531
728
501
447
469
Nearest Offshore or Glassy
Rating
(10 max)
3
3
2
1
2
2
1
1
2
2
1
1
2
1
1
1
1
2
2
1
2
Distance (km)
39
44
31
127
128
32
126
126
39
44
44
39
39
46
31
31
42
39
46
126
31
Best forecast wave conditions in Oahu
Rating
(10 max)
3
3
2
2
2
2
1
1
2
1
1
1
2
2
2
3
Best forecast wave conditions in United States
Rating
(10 max)
3
3
3
2
3
3
2
2
4
2
2
4
2
1
4
1
2
3
3
2
3
Header Global
Rating
(10 max)
7
6
5
8
7
5
5
9
8
9
6
7
8
8
6
9
6
4
9
7
7
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
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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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