Surf Forecasts:
Costa Nova surf forecast from 9 Sep 2026:
- Best quality surf: Thursday 10 Sep, 4AM (local time) - 5.5ft (1.7m), 8s period, NNW swell with cross-offshore winds.
- Most powerful swell: Sunday 13 Sep, 4PM (local time) - 5ft (1.5m), 12s period, NW swell with 614 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 4AM (local time) - 5.5ft (1.7m), 8s period with NNW 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 Thursday (Sep 10) at 4AM. The primary swell is predicted to be 1.7m and 8s period with a secondary swell of 0.9m and 11s. Another secondary swell of 0.3m and 10s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Costa Nova in the next 16 days are 1.5m 12s and forecast to arrive on Sunday (Sep 13) at 4PM. 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+) | 4AM (Thu 10th Sep) | 5.5ft (1.7m) 8s |
| Best Surf | 4AM (Thu 10th Sep) | 5.5ft (1.7m) 8s |
| Most Powerful | 4PM (Sun 13th Sep) | 5ft (1.5m) 12s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Right, Rusty here again, but this time in feet and knots for the old-school crew.
Let’s break down what Costa Nova is serving up.
Water temp is about 68°, which is normal for this time of year.
The first few days are a bit of a struggle. Wednesday afternoon has a messy 7ft cross-shore NNW swell, short period of 8 seconds, and a fresh 30 km/h wind making a lumpy mess. Not worth it. Thursday morning has a 5ft NNW swell with a better 10 second period, but it’s still cross-shore and marginal. Friday and Saturday morning are small and poor, though Saturday morning goes glassy with a tiny 3ft swell. You could get a few, but it’s ordinary.
Then Sunday the 13th morning fires up. Glassy, a clean 4ft NW groundswell with a long 12 second period. Decent energy. That’s clean, lined-up conditions. The morning is the best we’ve had. Best for intermediates.
Monday the 14th morning is also glassy with a 3ft NW swell, still with good period. Smaller, but clean and fun.
A quiet and choppy stretch hits Tuesday to Thursday.
Friday the 18th morning is a beauty. Clean 6ft NNW swell with a cross-off breeze. Energy is strong. That’s a proper session for intermediates.
Saturday the 19th morning is another cracker. Offshore wind, a solid 7ft NNW swell. Punchy and clean. A bit much for beginners.
Into the second week, Sunday the 20th morning is one for the experts. A tiny 3ft swell but with a ridiculous 19 second period. Massive groundswell energy at 748, and light cross-off winds. That long period at a beach/jetty can make things straight, but it’ll be clean and there’ll be power.
Monday the 21st morning is the absolute jewel. Clean 6ft NW swell at 13 seconds, cross-off breeze, and monster energy at 1667. That is excellent, powerful surf for experienced surfers. Do not sleep on that morning session.
Tuesday the 22nd morning gives another clean 6ft NW swell with offshore wind. Great fun for intermediates.
The last few days fade into small, glassy or clean waves under 3ft. Not much to write home about.
The top picks: Sunday the 13th morning, Friday the 18th morning, and the absolute best – Monday the 21st morning. Get it while it’s good.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Sat morning, min 17°C on Thu afternoon). Winds decreasing (fresh winds from the NNW on Wed afternoon, calm by Sat morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 31°C on Sun morning, min 19°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Wed 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | ||||||||||||||
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) | NNW 8 | NNW 8 | NNW 10 | NNW 10 | NNW 6 | NNW 6 | NNW 5 | NW 6 | NNW 7 | WNW 9 | NW 14 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 9 | NNW 5 | NNW 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 464 | 504 | 562 | 411 | 187 | 65 | 56 | 136 | 81 | 92 | 203 | 555 | 614 | 478 | 224 | 163 | 115 | 70 | 87 | 527 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross | cross | cross-on | glassy | glassy | cross-on | cross-off | glassy | cross-on | cross-off | glassy | cross-on | cross | cross-on | cross-on | cross |
High Tide | 3:26AM3.09m | 3:40PM3.34m | 4:03AM3.17m | 4:18PM3.40m | 4:38AM3.21m | 4:53PM3.38m | 5:12AM3.18m | 5:27PM3.28m | 5:43AM3.11m | 6:00PM3.13m | 6:15AM3.00m | 6:32PM2.94m | ||||||||
Low Tide | 9:01PM0.83m | 9:11AM0.88m | 9:41PM0.72m | 9:49AM0.76m | 10:16PM0.68m | 10:25AM0.71m | 10:50PM0.70m | 11:00AM0.73m | 11:23PM0.77m | 11:35AM0.80m | 11:55PM0.89m | 12:10PM0.93m | 00:28AM1.04m | |||||||
 |  | | |  | | | | | | | | | | | | | | | | |
 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — |
 | 7:54 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — | — | 7:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 18 | 18 | 18 | 21 | 20 | 21 | 27 | 26 | 26 | 31 | 31 | 28 | 28 | 26 | 23 | 19 | 18 | 18 |
Feels °C | 13 | 16 | 17 | 15 | 17 | 19 | 17 | 21 | 24 | 23 | 24 | 28 | 27 | 25 | 25 | 23 | 22 | 18 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | NW 13 | NNW 12 | NNW 10 | W 7 | W 7 | NNW 9 | NW 8 | NW 6 | NNW 7 | NNW 7 | NNW 9 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 9 | NW 11 | WNW 10 |
| kJ | 7 | 48 | 562 | 10 | 8 | 26 | 24 | 136 | 81 | 61 | 101 | 555 | 614 | 478 | 224 | 163 | 115 | 70 | 32 | 92 |
Swell 2 Height (m) Direction Period (s) | W 14 | W 12 | W 8 | W 11 | W 10 | W 7 | W 7 | — | WNW 10 | WNW 9 | NW 14 | W 9 | W 9 | W 10 | WNW 9 | WNW 9 | W 8 | W 8 | WNW 8 | — |
| kJ | 4 | 3 | 20 | 2 | 8 | 4 | 4 | — | 75 | 92 | 203 | 41 | 6 | 49 | 64 | 62 | 36 | 33 | 13 | — |
Swell 3 Height (m) Direction Period (s) | — | — | W 11 | — | — | NW 10 | W 8 | — | SW 13 | NW 16 | WNW 9 | NW 9 | SW 12 | — | — | — | — | NW 12 | — | — |
| kJ | — | — | 2 | — | — | 15 | 1 | — | 7 | 42 | 64 | 3 | 6 | — | — | — | — | 6 | — | — |
Wind waves Height (m) Direction Period (s) | NNW 8 | NNW 8 | — | NNW 10 | NNW 6 | NNW 6 | NNW 5 | — | — | NW 6 | — | — | — | — | — | NW 2 | NNW 3 | NNW 3 | NNW 5 | NNW 7 |
| kJ | 464 | 504 | — | 411 | 187 | 65 | 56 | — | — | 20 | — | — | — | — | — | 1 | 4 | 6 | 87 | 527 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 238 | 32 | 40 | 264 | 76 | 52 | 218 | 0 | 0 | 118 | 0 | 0 | 118 | 0 | 0 | 218 | 52 | 52 | 218 | 396 |
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.
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