
Surf Forecasts:
Kalapaki Beach surf forecast from 5 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 18ft (5.5m), 14s period, SSW swell with onshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 18ft (5.5m), 14s period, SSW swell with 12,483 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 8PM (local time) - 18ft (5.5m), 14s period with SSW swell.
Best Forecast Surf Conditions for Kalapaki Beach this week:
The surf forecast for Kalapaki Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 8PM. The primary swell is predicted to be 5.5m and 14s period with a secondary swell of 2.2m and 13s. Another secondary swell of 3.0m and 8s is also forecast. The wind is predicted to be onshore as the swell arrives.
The most powerful waves expected at Kalapaki Beach in the next 16 days are 5.5m 14s and forecast to arrive on Monday (Sep 07) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 10s period and expected on Tuesday (Sep 08) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Mon 7th Sep) | 18ft (5.5m) 14s |
| Best Surf | 8PM (Mon 7th Sep) | 18ft (5.5m) 14s |
| Most Powerful | 8PM (Mon 7th Sep) | 18ft (5.5m) 14s |
Table - best surf conditions forecast for Kalapaki Beach over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for Kalapaki Beach.
To be honest, the outlook is a bit of a struggle. We’ve got a few windows where it might be worth a paddle, but nothing that’s going to have you calling in sick. The water temp is sitting right around average for this time of year, so no surprises there.
The first real sniff of anything is Friday afternoon the 4th, but it’s a no-go. The wind is a moderate cross-shore at 15 mph, and the cross-chop will be messy. The swell is 5ft from the SSE, with a period of 12 seconds, and the combined energy is 1290, which is moderate. But the conditions are just too marginal.
Saturday the 5th morning is the standout, and it’s the only real highlight. The swell jumps to 7ft from the ENE, with a 14-second period – that’s proper groundswell energy. The wind is cross-shore but still a moderate breeze at 15 mph, so it won’t be glassy, but it’s workable. The combined energy is a meaty 2667, so there’s some grunt in the water. Watch out for the crowds though, Kalapaki can get busy. The afternoon drops off a touch, losing a second of period and the score drops.
Sunday the 6th is a write-off. The wind goes cross-onshore, and the surf is just choppy and poor. The energy drops to 2158, and it’s not worth the effort.
Then we hit a real rough patch. From Monday the 7th through to Wednesday the 11th, it’s a mix of strong winds, lumpy conditions, and poor surf. We see a spike on Monday the 7th with a 10ft swell from the SSW and a 15-second period, generating 6101 energy, but it’s accompanied by a risk of thunderstorms and a strong cross-onshore wind. That’s a big, messy, unsurfable mess – more for the kite crew than paddle surfers.
The middle of the week stays poor. The swell drops back, the wind stays onshore, and the energy sits between 480 and 688. Not much to get excited about. The weekend of the 12th and 13th is marginal at best, with cross-shore winds and a moderate cross-chop, but the waves are still too messy.
We get a glimmer of hope on Saturday the 19th. The morning shows a 7ft swell from the ENE with a 9-second period, and the wind is a light cross-onshore at 6 mph. The energy is 1297, so it’s moderate. The afternoon holds similar, with a 7ft swell and light winds. It’s the best looking option in the second week, but it’s a long way off and the period is short, so the waves will be a bit crumbly.
Overall, Saturday the 5th morning is your best bet. Get on it early if you can, because the rest of the forecast is a waiting game.
Rusty.
Short Range ForecastHeavy rain (total 24mm), heaviest during Sun night. Warm (max 26°C on Fri afternoon, min 23°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 25mm), heaviest during Mon night. Warm (max 28°C on Tue afternoon, min 25°C on Wed night). Winds decreasing (strong winds from the SE on Mon night, calm by Tue night). | |||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | ||||||||||||||
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) | SSE 12 | S 11 | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | SSW 14 | SSW 15 | SW 15 | SW 12 | ENE 12 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 8 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | ||||||||||||||||||||
680 | 584 | 1700 | 1474 | 1616 | 1387 | 1127 | 1475 | 3649 | 7533 | 4450 | 1047 | 787 | 427 | 341 | 257 | 250 | 314 | 237 | 208 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross | cross | cross |
High Tide | 12:04PM0.65m | 11:37PM0.20m | 12:57PM0.68m | 00:45AM0.25m | 1:42PM0.69m | 1:36AM0.30m | 2:20PM0.68m | 2:21AM0.36m | 2:54PM0.66m | 3:04AM0.41m | 3:24PM0.61m | 3:47AM0.47m | ||||||||
Low Tide | 3:24AM0.06m | 8:23PM0.17m | 8:30PM0.15m | 6:02AM0.04m | 8:46PM0.13m | 7:02AM0.02m | 9:05PM0.11m | 7:55AM0.03m | 9:25PM0.09m | 8:43AM0.05m | 9:45PM0.07m | |||||||||
— | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | 6:22 | — | — | |
6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | 1 | — | — | — | 3 | 2 | — | 14 | 4 | 4 | 15 | 3 | — | — | — | 1 | 2 | — | — | 2 |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 26 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 26 | 26 | 25 |
Feels °C | 24 | 23 | 25 | 25 | 25 | 26 | 25 | 25 | 24 | 25 | 23 | 28 | 29 | 30 | 30 | 29 | 28 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | SSE 12 | S 11 | S 12 | S 12 | S 12 | SSW 12 | SSW 12 | SSW 14 | SSW 15 | SW 15 | SW 12 | S 9 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | SSW 13 | SSW 13 | SSW 12 | E 12 |
680 | 584 | 846 | 723 | 472 | 560 | 447 | 1475 | 3649 | 7533 | 4450 | 817 | 787 | 427 | 216 | 165 | 178 | 131 | 123 | 112 | |
Swell 2 Height (m) Direction Period (s) | E 14 | E 14 | SSW 18 | SSW 18 | SSE 10 | SSW 16 | S 11 | SSW 18 | E 13 | E 13 | ENE 12 | ENE 12 | S 8 | SSW 8 | SSW 14 | SSW 13 | E 13 | E 12 | E 12 | SSW 16 |
289 | 485 | 121 | 121 | 63 | 175 | 286 | 442 | 848 | 736 | 1140 | 1047 | 339 | 202 | 341 | 257 | 163 | 106 | 104 | 175 | |
Swell 3 Height (m) Direction Period (s) | WSW 13 | SSW 19 | NNE 10 | NNE 10 | SSW 16 | SSE 10 | S 19 | SSE 10 | SSE 8 | NNW 13 | SSW 15 | W 9 | SSW 14 | SSW 14 | SSW 8 | S 8 | SSW 8 | SW 17 | SW 18 | SSE 9 |
16 | 37 | 20 | 18 | 198 | 36 | 184 | 38 | 83 | 17 | 566 | 390 | 449 | 356 | 107 | 58 | 49 | 137 | 154 | 54 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 13 | ESE 7 | SSE 8 | — | — | — | — | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 |
305 | 301 | 1700 | 1474 | 1616 | 1387 | 1127 | 1064 | 1521 | 860 | 836 | — | — | — | — | — | 250 | 314 | 237 | 208 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 33 | 17 | 17 | 31 | 17 | 31 | 17 | 118 | 126 | 231 | 136 | 31 | 31 | 10 | 14 | 31 | 39 | 33 | 17 | 17 |
Best forecast wave conditions in Kaua'i | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Kalapaki Beach Surf forecast
The above surf forecast table for Kalapaki Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kalapaki Beach can be found by selecting the local surf guide option on the grey menu. Our Kalapaki Beach 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 (Kalapaki Beach) 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 Kalapaki Beach 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.
Are you planning a vacation in Kaua'i? If you are looking for accommodation near Kalapaki Beach, camping, hotels and condos and appartments in Kaua'i, consider staying in Nawiliwili which is 1 km (1 miles) away. Alternatively, find information about places to stay and car hire in Lihue - Kauai which is 3 km (2 miles) away










