
Surf Forecasts:
Number Fours surf forecast from 16 Jul 2026:
- Best quality surf: Thursday 16 Jul, 2AM (local time) - 2.5ft (0.8m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Wednesday 22 Jul, 11PM (local time) - 4.5ft (1.4m), 13s period, ENE swell with 576 kJ wave energy.
- Next surfable swell (1★+): Thursday 16 Jul, 2AM (local time) - 2.5ft (0.8m), 16s 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 Thursday (Jul 16) at 2AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 0.9m 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 1.4m 13s and forecast to arrive on Wednesday (Jul 22) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Saturday (Jul 18) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 16th Jul) | 2.5ft (0.8m) 16s |
| Best Surf | 2AM (Thu 16th Jul) | 2.5ft (0.8m) 16s |
| Most Powerful | 11PM (Wed 22nd Jul) | 4.5ft (1.4m) 13s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, folks. Rusty here. Let’s have a look at what’s coming our way. The next 16 days aren’t exactly a goldmine for Number Fours, but we’ve got a couple of windows that might get the heart rate up.
The truth is, the first week is pretty flat and frustrating. For the first few days, from the 16th right through the 19th, the swell is just too small or too weak to bother with, and the wind is mostly a cross-off from the ENE. There’s a bit of energy in the water, but the combined energy is nothing to write home about, and it’s all coming in with that poor surf condition tag. You’ll be waiting for a set that never really comes.
We start to see a glimmer of hope on the 20th (Monday) and into the 21st. The swell picks up just a touch, but the scores are still marginal. It’s not until the 23rd (Thursday) that things get a little more interesting. The swell bumps up to around 4ft to 5ft, coming from the ENE, and the combined energy is climbing into moderate territory. The wind is still cross-off from the ENE, so it’s clean, but that’s a bit of a side-shore situation. It’s a definite step up for the intermediate crew.
Now, the standout window. The last few days of the month, from the 26th (Sunday) through the 28th (Tuesday), look like the best we’ll see. The swell holds steady at 4ft to 5ft, with a solid ENE direction that matches the optimum swell direction for this spot. The wind is a bit lighter, and the combined energy is strong, peaking on the 26th afternoon. This is a long-period groundswell, well over 15 seconds, which means it’ll have plenty of power and shape, but it might be a bit too straight for a beach break, so look for the point or reef sections. The water temperature is about average for the time of year.
Just keep in mind that Number Fours is a reef break that’s fairly consistent, and it’s an intermediate level spot. Crowds are sometimes a thing here, so you might have some company. The wind is mostly cross-off, so it’s clean, but not that perfect glassy offshore we all dream of.
After that, the 29th and 30th drop off pretty quickly. The swell gets small again, and the energy fades to nothing. It’s a short-lived run of good surf.
So, if you’re picking a day, the 26th through the 28th are your best bet. It’s not a world-class swell, but it’s the best on offer. The 23rd is a solid second option for a bit of a paddle.
Rusty.
Short Range ForecastLight rain (total 3mm), mostly falling on Wed night. Warm (max 26°C on Thu morning, min 24°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Mon afternoon, min 24°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | ||||||||||||||
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) | SSW 16 | SSW 16 | SSW 17 | SW 14 | ENE 7 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | S 16 | S 16 | S 15 | S 14 | E 14 | E 14 |
Wave Graph | |||||||||||||||||||
314 | 175 | 195 | 211 | 134 | 196 | 147 | 141 | 210 | 298 | 264 | 243 | 218 | 329 | 321 | 271 | 329 | 316 | 315 | |
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 |
High Tide | 5:41AM0.26m | 5:59PM0.69m | 6:41AM0.30m | 6:36PM0.61m | 7:44AM0.34m | 7:11PM0.52m | 8:53AM0.38m | 7:45PM0.43m | 10:04AM0.43m | 8:19PM0.34m | 11:13AM0.49m | 8:56PM0.27m | |||||||
Low Tide | 00:34AM0.01m | 10:49AM0.01m | 1:08AM0.01m | 11:44AM0.08m | 1:42AM0.01m | 12:46PM0.16m | 2:15AM0.02m | 2:03PM0.22m | 2:48AM0.03m | 3:52PM0.27m | 3:23AM0.04m | 6:20PM0.26m | 4:02AM0.05m | ||||||
— | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | |
7:15 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:14 | — | |
mm | 2 | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 26 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 25 | 26 | 25 | 26 | 26 | 24 |
Feels °C | 25 | 25 | 25 | 25 | 23 | 25 | 24 | 25 | 25 | 23 | 23 | 22 | 22 | 24 | 24 | 24 | 24 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | NE 7 | W 14 | SW 14 | W 14 | SSW 16 | SSW 14 | SSW 13 | SSW 14 | S 12 | S 12 | SSW 13 | SSW 12 | S 16 | S 16 | S 15 | S 14 | E 14 | E 14 |
314 | 96 | 203 | 211 | 144 | 196 | 147 | 141 | 210 | 108 | 73 | 95 | 44 | 329 | 321 | 271 | 329 | 316 | 315 | |
Swell 2 Height (m) Direction Period (s) | ENE 7 | W 14 | SSW 13 | W 14 | SW 16 | W 14 | W 13 | NNE 8 | WNW 13 | W 12 | NNE 8 | S 18 | S 18 | SW 18 | E 17 | E 16 | E 14 | S 14 | S 13 |
68 | 203 | 113 | 148 | 125 | 98 | 90 | 23 | 56 | 28 | 19 | 106 | 97 | 83 | 94 | 237 | 264 | 307 | 273 | |
Swell 3 Height (m) Direction Period (s) | W 15 | SSW 16 | SSW 17 | SSW 18 | SSW 12 | SSW 12 | NNE 7 | WNW 13 | NNE 7 | SSE 9 | S 19 | W 12 | NNE 8 | W 11 | SW 18 | E 8 | SW 17 | SW 16 | SSW 26 |
212 | 175 | 195 | 60 | 55 | 55 | 18 | 57 | 9 | 8 | 66 | 25 | 25 | 10 | 81 | 28 | 72 | 68 | 224 | |
Wind waves Height (m) Direction Period (s) | — | — | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
— | — | 64 | 117 | 134 | 120 | 113 | 123 | 139 | 298 | 264 | 243 | 218 | 165 | 138 | 123 | 180 | 147 | 158 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 31 | 39 | 2 | 31 | 31 | 2 | 31 | 42 | 31 | 2 | 31 | 1 | 2 | 31 | 1 | 31 | 32 | 1 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.










