
Surf Forecasts:
Costa Nova surf forecast from 8 Aug 2026:
- Best quality surf: Saturday 15 Aug, 1AM (local time) - 5.5ft (1.7m), 7s period, NNW swell with glassy winds.
- Most powerful swell: Friday 14 Aug, 10PM (local time) - 6ft (1.9m), 8s period, NW swell with 416 kJ wave energy.
- Next surfable swell (1★+): Saturday 8 Aug, 10PM (local time) - 2.5ft (0.8m), 7s period with W swell.
Best Forecast Surf Conditions for Costa Nova this week:
The surf forecast for Costa Nova over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Aug 08) at 10PM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.3m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Costa Nova in the next 16 days are 1.9m 8s and forecast to arrive on Friday (Aug 14) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sat 8th Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 1AM (Sat 15th Aug) | 5.5ft (1.7m) 7s |
| Most Powerful | 10PM (Fri 14th Aug) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Costa Nova’s got cooking for us over the next couple of weeks.
Right off the bat, it’s a quiet start. The forecast is pretty flat and choppy for the first week, with only small, weak swell and cross-onshore winds messing things up. You’re looking at waist-high slop at best, with the combined energy struggling to get past the low 100s (133), and the wind is just never your friend. The water is sitting at a touch warmer than normal for this time of year, about 70°, which is a small bonus if you’re just floating around.
The first real glimmer of hope comes on Friday morning, 14 August. The wind will swing to a glassy WSW, the swell bumps up to 3ft from the WNW, and the combined energy jumps to 256 – that’s moderate wave energy finally. It’s not a monster, but it’ll be clean and rideable. If you’re keen, that’s the first session to pencil in.
Saturday morning, 15 August is another good shout. The wind comes from the S at a light 6 mph, giving a clean, cross-off breeze. The swell is a bit bigger at 4ft from the NNW, with energy at 293. The wave period is a short 7 seconds, so it’ll be a bit crumbly and quick, but it’ll be fun on a longboard or a fish.
The real standout, the one to circle on the calendar, is Monday morning, 17 August. We’ve got a glassy morning with a light 3 mph wind from the W, zero chop. The swell is a solid 6ft from the NNW, and the combined energy is pumping at 344. That’s a good, punchy beach break, but because it’s over 5ft, it’s a bit much for beginners. The swell period is a short 7 seconds, so it won’t be the most organised, but with glassy conditions, it’s going to be a whole lot of fun for those who know what they’re doing. Expect crowds at Costa Nova, it’s a popular spot, so be early.
If you miss that, Tuesday morning, 18 August is also a cracker. The wind is dead calm, glassy, with a 5ft NW swell and energy at 265. There’s a risk of thunderstorms, but if you’re in the water when it’s clear, it’ll be perfect.
Wednesday morning, 19 August and Thursday morning, 20 August both offer similar deals: glassy mornings, 5ft to 5ft swell from the NW, and energy in the 270-380 range. The second week is a bit of a repeat – consistent 5ft to 6ft NW swell, but the winds get a bit more cross-on in the afternoons. The mornings are definitely the play.
The last week of the forecast, from the 21st and 22nd, the swell stays around 3ft to 5ft, but the wind is less reliable. Saturday morning, 22 August, has a 5ft NW swell with a long 9-second period and light cross-shore wind, which could be fun, but it’s a bit of a gamble.
Overall, the first week is a write-off unless you’re happy with ankle-snappers. The second week, especially the mornings from the 17th to the 20th, is where it’s at. Get on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sat morning, min 18°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Wed afternoon, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | |||||||||||||||
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) | W 9 | W 8 | W 7 | W 7 | W 7 | W 7 | NW 8 | NW 7 | NNW 9 | NW 12 | NW 5 | W 10 | W 9 | W 9 | W 9 | W 9 | WNW 10 | WNW 9 | NNW 7 | NNW 7 | NNW 7 |
Wave Graph | |||||||||||||||||||||
14 | 29 | 81 | 80 | 85 | 64 | 60 | 52 | 54 | 35 | 46 | 71 | 133 | 136 | 136 | 108 | 236 | 181 | 158 | 126 | 320 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | glassy | glassy | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | glassy |
High Tide | 12:11PM2.62m | 00:54AM2.63m | 1:25PM2.79m | 2:02AM2.78m | 2:23PM2.99m | 2:56AM2.93m | 3:13PM3.18m | 3:43AM3.06m | 3:58PM3.33m | 4:25AM3.14m | 4:40PM3.40m | 5:05AM3.17m | 5:20PM3.40m | ||||||||
Low Tide | 5:16AM1.37m | 6:01PM1.32m | 6:35AM1.32m | 7:19PM1.19m | 7:43AM1.19m | 8:23PM1.00m | 8:39AM1.04m | 9:15PM0.84m | 9:27AM0.89m | 10:00PM0.72m | 10:10AM0.79m | 10:41PM0.67m | 10:50AM0.74m | 11:20PM0.68m | |||||||
6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — | 6:41 | — | — | 6:43 | — | — | |
— | 8:42 | — | — | 8:40 | — | — | 8:39 | — | — | 8:38 | — | — | 8:37 | — | — | 8:36 | — | — | 8:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 20 | 19 | 20 | 19 | 19 | 21 | 20 | 20 |
Feels °C | 21 | 22 | 24 | 21 | 21 | 20 | 19 | 19 | 20 | 20 | 17 | 19 | 21 | 20 | 20 | 22 | 18 | 20 | 21 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | W 6 | W 8 | W 7 | W 7 | W 7 | W 7 | NW 8 | NW 7 | NNW 9 | NW 5 | NNW 11 | W 10 | NW 6 | W 9 | W 9 | NNW 6 | WNW 10 | WNW 9 | WNW 9 | WNW 8 | NW 9 |
6 | 29 | 81 | 80 | 85 | 64 | 60 | 52 | 54 | 34 | 46 | 71 | 46 | 136 | 136 | 103 | 236 | 161 | 116 | 126 | 215 | |
Swell 2 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NW 11 | NW 10 | NNW 10 | NW 9 | W 7 | WSW 6 | W 6 | NW 8 | WNW 11 | NNW 10 | W 9 | NNW 10 | NNW 10 | W 9 | N 9 | WNW 9 | NW 12 | — | — |
10 | 5 | 32 | 50 | 64 | 41 | 31 | 13 | 11 | 18 | 24 | 36 | 133 | 19 | 9 | 108 | 2 | 115 | 34 | — | — | |
Swell 3 Height (m) Direction Period (s) | W 9 | NW 13 | N 6 | — | — | W 12 | W 11 | W 11 | WNW 10 | NW 12 | WNW 9 | — | NNW 9 | — | — | NW 12 | — | — | — | — | — |
14 | 7 | 1 | — | — | 3 | 2 | 2 | 10 | 35 | 8 | — | 33 | — | — | 37 | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | WNW 2 | — | — | NW 3 | NNW 4 | NW 5 | NW 5 | NNW 5 | — | NNW 6 | NNW 6 | — | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 |
— | — | — | — | 1 | — | — | 2 | 11 | 21 | 38 | 45 | — | 39 | 118 | — | 90 | 181 | 158 | 116 | 320 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 54 | 57 | 222 | 0 | 0 | 218 | 52 | 52 | 297 | 76 | 52 | 218 | 52 | 52 | 238 | 32 | 32 | 357 | 32 | 0 | 132 |
Best forecast wave conditions in Beira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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Information about the Costa Nova Surf forecast
The above surf forecast table for Costa Nova provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Costa Nova can be found by selecting the local surf guide option on the grey menu. Our Costa Nova 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 (Costa Nova) 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 Costa Nova 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.
Costa Nova is 8 km (5 miles) from the city of Ilhavo. If you plan a holiday in Beira, look for hotels and other accommodation in Ilhavo. Ilhavo has rooms for a wide range of budgets as well as car hire and transport links.











