Surf Forecasts:
Tennis Courts surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 2AM (local time) - 1.5ft (0.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Tuesday 25 Aug, 2AM (local time) - 8ft (2.4m), 8s period, ENE swell with 678 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 2AM (local time) - 1.5ft (0.5m), 16s period with SW swell.
Best Forecast Surf Conditions for Tennis Courts this week:
The surf forecast for Tennis Courts over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 2AM. The primary swell is predicted to be 0.5m and 16s 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 Tennis Courts in the next 16 days are 2.4m 8s and forecast to arrive on Tuesday (Aug 25) 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 1.0m 7s period and expected on Thursday (Aug 20) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 20th Aug) | 1.5ft (0.5m) 16s |
| Best Surf | 2AM (Thu 20th Aug) | 1.5ft (0.5m) 16s |
| Most Powerful | 2AM (Tue 25th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Tennis Courts over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s on the menu for the next couple weeks.
It’s a quiet start at Tennis Courts. For the first few days, we’ve got small, knee-to-waist high swell, mostly under 3 ft, with the wind sitting cross-off. That wind is keeping the surface tidy, but honestly, the surf just isn’t doing much. Thursday afternoon sees the wind drop right back to almost nothing, a slight air, and the energy is moderate (355). That’s the first window that looks worth a paddle—clean, glassy potential, even if the swell stays modest at 2 ft from the SSW with a long 17 second period. That long period will help the shape on this reef, so it could be fun for an advanced surfer on a log or a fish.
Friday afternoon offers something similar: glassy conditions again, with 2 ft of SSW swell at 16 seconds, and the energy holding steady (357). That’s the pick of the early week. Nice and clean, low key.
Then things go a bit sideways. From Saturday the 22nd onward, the wind cranks up from the ENE—fresh to strong breezes, 22–25 mph. The swell builds, but it gets messy. Saturday’s 2 ft gets blown out, and by Sunday the 23rd, we’re looking at 8 ft of short-period E swell (7 seconds) with strong wind. That’s a choppy, blown-out mess, and the energy’s high (860) but not for surfers. This setup looks more interesting for kite surfing than paddle surfing.
That rough spell drags on through to around Thursday the 27th. The swell stays between 6 ft and 7 ft, mostly from the ENE, with short periods and persistent cross-off winds. It’s not good for the lineup. Even when the swell pushes up toward 8 ft on the 29th and 30th, the period is still short, and the wind is moderate to fresh. That’s big and ugly.
Late in the run, around Monday the 31st and into September, there’s a shift. The swell direction swings back to S and SSE, with longer periods (12 seconds) and energy readings well into four digits (2117). The size is solid—over 7 ft—but the wind stays stiff from the ENE. That’s still a cross-off, but with that kind of energy and a long period, this reef could hold up for the experienced crew. Tuesday the 1st of September afternoon shows a slight drop in wind (12 mph from the NE) and the swell easing to 6 ft from the ENE at 9 seconds, with moderate energy (1131). That’s a more manageable option for the confident surfer.
The standout is Friday afternoon the 21st: glassy, 2 ft from the SW at 16 seconds. Small but clean, and the reef should give you a nice little wall. Best of the whole outlook.
Honorable mention goes to Thursday afternoon the 20th—almost no wind, tiny but long period swell, perfect for a sunset cruise.
If you’re an expert, keep an eye on the last few days of August and the start of September. The size and energy are there, but the wind needs to cooperate. It’s promising, but less certain that far out.
Stay safe, keep your eyes on the horizon.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 24°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri afternoon, min 25°C on Fri morning). Winds increasing (calm on Fri afternoon, strong winds from the ENE by Sun morning). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 | E 8 | ENE 8 | SW 16 | E 8 | SW 16 | SSW 18 | SSW 17 | SW 16 | SW 17 | SW 16 | SSW 16 | SW 16 | SW 16 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph | |||||||||||||||||||||
165 | 120 | 155 | 129 | 100 | 129 | 207 | 200 | 274 | 291 | 261 | 322 | 261 | 255 | 428 | 569 | 439 | 350 | 435 | 456 | 678 | |
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 | glassy | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:59AM0.51m | 7:16PM0.30m | 10:13AM0.53m | 11:25AM0.56m | 10:11PM0.21m | 12:25PM0.59m | 00:08AM0.21m | 1:12PM0.63m | 1:06AM0.23m | 1:52PM0.66m | 1:46AM0.26m | 2:26PM0.67m | 2:21AM0.29m | ||||||||
Low Tide | 3:56PM0.27m | 2:01AM0.10m | 2:47AM0.12m | 8:27PM0.20m | 8:41PM0.17m | 5:06AM0.12m | 9:00PM0.16m | 6:08AM0.10m | 9:18PM0.14m | 6:59AM0.08m | 9:35PM0.13m | ||||||||||
6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | |
— | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 27 | 27 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 24 | 23 | 24 | 26 | 25 | 26 | 29 | 29 | 29 | 29 | 30 | 29 | 25 | 25 | 25 | 23 | 23 | 23 | 23 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | S 13 | E 8 | S 13 | E 8 | E 8 | E 8 | E 8 | ENE 7 | NE 7 | ENE 7 | ENE 7 | SSW 16 | SW 16 | SW 16 | SSW 16 | SSE 13 | SSW 15 | SSE 13 | SSE 12 | SSE 11 | SSE 10 |
165 | 120 | 116 | 86 | 84 | 102 | 72 | 134 | 82 | 67 | 96 | 322 | 261 | 255 | 212 | 99 | 144 | 139 | 169 | 148 | 77 | |
Swell 2 Height (m) Direction Period (s) | SW 17 | S 13 | SW 18 | SW 16 | S 12 | SW 16 | SSW 18 | SSW 17 | SW 16 | SW 17 | SW 16 | WNW 10 | E 8 | WNW 10 | S 14 | SW 15 | SE 13 | SE 11 | SSW 14 | SSW 13 | SSW 13 |
74 | 119 | 79 | 129 | 45 | 129 | 207 | 200 | 274 | 291 | 261 | 32 | 33 | 35 | 104 | 116 | 88 | 61 | 127 | 102 | 127 | |
Swell 3 Height (m) Direction Period (s) | E 9 | SW 18 | W 12 | S 12 | SSW 16 | S 12 | S 11 | S 11 | E 8 | NNE 6 | W 10 | S 13 | WNW 10 | S 12 | WNW 11 | SSW 15 | WNW 11 | SW 14 | SSW 18 | SSW 18 | SSW 17 |
15 | 80 | 25 | 44 | 100 | 45 | 23 | 21 | 31 | 28 | 51 | 54 | 34 | 47 | 40 | 76 | 12 | 100 | 31 | 31 | 55 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | NNE 7 | ENE 8 | NE 6 | NNE 6 | NE 6 | NNE 6 | — | — | — | — | ENE 7 | ENE 6 | ENE 6 | E 7 | E 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 |
163 | 34 | 155 | 43 | 26 | 34 | 26 | — | — | — | — | 102 | 107 | 226 | 428 | 569 | 439 | 350 | 435 | 456 | 678 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 28 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 15 | 0 | 28 | 29 | 36 | 36 | 39 | 42 | 29 | 36 | 36 | 29 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Tennis Courts Surf forecast
The above surf forecast table for Tennis Courts provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Tennis Courts can be found by selecting the local surf guide option on the grey menu. Our Tennis Courts 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 (Tennis Courts) 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 Tennis Courts 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.
Tennis Courts is 4 km (2 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.











