
Surf Forecasts:
Number Fours surf forecast from 10 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: Sunday 12 Jul, 2PM (local time) - 8ft (2.4m), 8s period, ENE swell with 654 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 0.9m and 8s. 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 2.4m 8s and forecast to arrive on Sunday (Jul 12) at 2PM. 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 Type | Time (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 | 2PM (Sun 12th Jul) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
Alright, Rusty here again. Let’s break it down in feet and degrees.
Straight up, it’s not a classic stretch. The wind is locked in from the east-northeast as a cross-off breeze, blowing a solid 19 to 25 mph for most of the opening days. That’s going to keep things a bit messy. The swell is all short-period windswell, mostly around 7 to 8 seconds, which means the waves are going to be crumbly, lacking punch, and hard to get a proper barrel out of. The water temperature is sitting at 79.2°, which is about normal for the time of year, so no worries on the thermal front.
We start off with a rough patch. Friday the 10th and Saturday the 11th are poor – the swell is there, around 5.9ft to 6.6ft, but the wind is just too strong and the period’s too short. The energy is moderate at best, even with readings around 469 to 670 (combined energy). It’s just not going to be a fun paddle. The first real glimmer of hope doesn’t come until the afternoon of Saturday the 11th, when a new swell from the southwest rolls in at 18 seconds. That’s a proper long-period groundswell, but it’s only 2.3ft and the tide could be a factor. It’s a marginal call, but it’s something.
The pattern continues through the middle of the week. Sunday the 12th through Tuesday the 15th is a lot of the same: 4.9ft to 6.9ft, short period, moderate energy (around 500 to 890), and a cross-off wind that’s just too fresh to make it clean. It’s more of a battle than a session. Wednesday the 15th afternoon sees a drop in size to 2.3ft with a 14-second SSW swell, but again, it’s marginal. The swell window is trying to open, but the wind isn’t playing ball.
Now, where it gets interesting is the long-range stuff. Around Thursday the 24th and Friday the 25th, the swell direction swings to the SSW, with a period of 16 to 18 seconds. That’s a lovely long-period groundswell, and the combined energy jumps up to 642 to 928 (moderate to strong). The size is small, only 2.6ft to 3.3ft, but at Number Fours, a reef setup, that long-period energy can produce some really fun, lined-up waves, especially if the wind lays down. Saturday the 25th morning is the pick of the bunch – a score of 2 out of 10 is the best we see, with a moderate breeze and a 2.9ft SSW swell at 16 seconds. The wind is still cross-off, but the quality is the best of the whole outlook.
The big caveat is that this is a long-range call, so don’t lock it in just yet. The first week is a write-off unless you’re desperate for a paddle. The second week is where the potential is, but it’s not a guarantee. The surf is inconsistent, and the good windows are short. If you’re a beginner, anything over 4.9ft and short period is going to be a handful, so stick to the smaller days.
So, the standout? Saturday the 25th morning. It’s the only time the numbers line up for a proper session. Keep your fingers crossed for a little luck.
Short Range ForecastMostly dry. Warm (max 25°C on Fri morning, min 24°C on Fri morning). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed afternoon, min 24°C on Mon morning). Mainly fresh winds. | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | SW 14 | SSW 17 | ENE 7 | SSW 14 | SSW 16 | SSW 16 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
390 | 339 | 498 | 456 | 316 | 405 | 485 | 525 | 525 | 422 | 336 | 265 | 294 | 186 | 197 | 180 | 178 | 314 | 175 | 195 | 360 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | 1:36PM0.69m | 00:40AM0.17m | 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 | ||||||||
Low Tide | 9:18PM0.12m | 6:28AM-0.08m | 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 | ||||||||
5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | |
— | 7:16 | — | — | 7:16 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — |
Temp °C | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 |
Feels °C | 22 | 21 | 22 | 23 | 22 | 23 | 21 | 21 | 21 | 22 | 22 | 21 | 23 | 23 | 25 | 24 | 24 | 25 | 23 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | S 12 | SSW 11 | SW 19 | SSW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SSW 15 | SW 15 | SW 14 | SW 14 | SW 14 | W 15 | W 15 | W 15 | SSW 16 | NNE 7 | W 14 | SSW 14 |
71 | 42 | 184 | 221 | 316 | 309 | 376 | 367 | 353 | 287 | 217 | 208 | 191 | 186 | 227 | 224 | 218 | 314 | 62 | 203 | 186 | |
Swell 2 Height (m) Direction Period (s) | W 13 | SW 21 | S 12 | W 14 | W 13 | W 13 | S 13 | SSE 12 | W 12 | SSE 12 | W 18 | W 18 | W 16 | W 16 | SSW 13 | SW 13 | SSW 14 | NNE 8 | W 14 | SSW 17 | W 14 |
13 | 109 | 42 | 63 | 54 | 54 | 29 | 28 | 26 | 27 | 97 | 152 | 190 | 190 | 111 | 164 | 178 | 73 | 203 | 195 | 148 | |
Swell 3 Height (m) Direction Period (s) | SSW 21 | W 13 | W 13 | S 12 | S 12 | S 11 | W 12 | W 12 | SSE 12 | W 12 | SSE 11 | SW 18 | SSW 19 | SW 19 | SSW 17 | SW 18 | NNE 8 | W 15 | SSW 16 | SSW 13 | SSW 18 |
45 | 29 | 55 | 44 | 25 | 23 | 27 | 26 | 28 | 26 | 25 | 82 | 146 | 94 | 197 | 152 | 48 | 212 | 175 | 113 | 60 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | NE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 |
390 | 339 | 498 | 456 | 316 | 405 | 485 | 525 | 525 | 422 | 336 | 265 | 294 | 229 | 178 | 180 | 132 | 110 | 98 | 192 | 360 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 42 | 31 | 39 | 42 | 32 | 39 | 44 | 39 | 39 | 39 | 31 | 31 | 39 | 2 | 31 | 33 | 31 | 32 | 39 | 31 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.










