Surf Forecasts:
Costa Nova surf forecast from 2 Sep 2026:
- Best quality surf: Saturday 5 Sep, 10PM (local time) - 4ft (1.2m), 13s period, NW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 10AM (local time) - 5ft (1.5m), 13s period, WNW swell with 703 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 4AM (local time) - 4.5ft (1.4m), 7s period with NW 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 Wednesday (Sep 02) at 4AM. The primary swell is predicted to be 1.4m and 7s period with a secondary swell of 0.4m and 8s. Another secondary swell of 0.1m and 14s is also forecast. 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 1.5m 13s and forecast to arrive on Monday (Sep 07) at 10AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 2nd Sep) | 4.5ft (1.4m) 7s |
| Best Surf | 10PM (Sat 5th Sep) | 4ft (1.2m) 13s |
| Most Powerful | 10AM (Mon 7th Sep) | 5ft (1.5m) 13s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Right then, let’s talk about Costa Nova. The first week is pretty average, but there’s a real stand-out session way out in the second week that makes this worth paying attention to.
Right now, the surf is small and messy. The water is 69°, which is a touch warmer than normal for the time of year, but that’s not going to make the choppy cross-onshore wind feel any better. It’s not until the 6th that we get a proper window of clean conditions. That Sunday morning, the wind goes glassy and the swell is 4ft from the northwest with a 12-second period. The combined energy is moderate (495), and the conditions are actually good. That’s the one to aim for if you want a smooth session, but the swell isn’t huge.
Then we go through a messy patch. A bit of swell on the 7th and 8th but the wind is all wrong. A 5ft west-northwest swell on the Monday morning gets messed up by a cross-shore breeze. It’s just frustrating.
Now, the real standout is Wednesday the 16th of September. That morning, you’ve got a clean, glassy surface with a 6ft northwest swell and a 12-second period. The combined energy is strong (1025), so there’s some proper power in the water. The wind is calm, so it’ll be clean. That’s expert territory at 6ft, but if you’ve got the skills, this is the best session in the whole 16-day run. It’s a long way off though, so don’t book the day off work just yet.
In between, there are a few mornings where the wind is light or clean, like the 11th with a 3ft glassy swell, and the 13th with a 3ft clean cross-off wind. But they’re ordinary at best. The rest is mostly choppy cross-onshore junk.
Bottom line: There’s a good run of nothing much, then a golden window on Sunday the 6th for some clean but modest waves, and the real score is that Wednesday the 16th morning. Keep an eye on that one.
Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Thu afternoon, min 17°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Sat afternoon. Warm (max 36°C on Sat morning, min 16°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | |||||||||||||||
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) | NNW 6 | NNW 6 | NNW 7 | NNW 7 | WNW 9 | WNW 8 | WNW 8 | WNW 9 | WNW 9 | WNW 9 | NW 14 | NW 12 | NW 11 | NW 11 | WNW 15 | WNW 13 | WNW 12 | WNW 11 | NW 10 | NW 9 | NNW 7 |
Wave Graph | |||||||||||||||||||||
61 | 68 | 116 | 76 | 68 | 61 | 59 | 113 | 99 | 101 | 158 | 494 | 418 | 268 | 376 | 703 | 505 | 387 | 636 | 461 | 323 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | glassy | glassy | cross | cross | cross-on | cross-on | cross-off | off | on | cross | cross | on | cross | cross | cross-on | cross-on | glassy | cross-on | cross |
High Tide | 6:55AM2.91m | 7:16PM2.91m | 7:39AM2.77m | 8:09PM2.71m | 8:42AM2.62m | 9:33PM2.52m | 10:22AM2.53m | 11:29PM2.47m | 12:06PM2.61m | 00:56AM2.59m | 1:19PM2.80m | 1:57AM2.77m | 2:14PM3.02m | 2:45AM2.95m | |||||||
Low Tide | 1:04PM0.99m | 1:31AM1.08m | 1:55PM1.15m | 2:24AM1.27m | 2:59PM1.32m | 3:34AM1.43m | 4:24PM1.41m | 5:02AM1.49m | 6:01PM1.36m | 6:31AM1.41m | 7:20PM1.19m | 7:38AM1.23m | 8:17PM0.99m | ||||||||
7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | |
— | 8:06 | — | — | 8:04 | — | — | 8:02 | — | — | 8:00 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 22 | 28 | 29 | 26 | 27 | 27 | 30 | 36 | 31 | 26 | 23 | 21 | 20 | 18 | 18 | 18 | 18 | 18 | 17 |
Feels °C | 19 | 18 | 23 | 26 | 26 | 23 | 24 | 23 | 26 | 34 | 29 | 26 | 23 | 22 | 21 | 16 | 15 | 18 | 17 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NNW 7 | NNW 7 | NNW 6 | WNW 8 | WNW 8 | WNW 9 | NW 5 | NNW 6 | WNW 9 | NW 12 | NW 11 | NW 11 | WNW 15 | WNW 13 | WNW 12 | WNW 11 | NW 10 | — | NW 11 |
50 | 28 | 116 | 76 | 31 | 61 | 59 | 113 | 39 | 47 | 101 | 494 | 418 | 268 | 376 | 703 | 505 | 387 | 636 | — | 5 | |
Swell 2 Height (m) Direction Period (s) | NNW 8 | SW 16 | WNW 9 | WNW 9 | WNW 9 | SW 14 | NW 10 | SW 13 | WNW 9 | WNW 9 | NW 11 | WNW 9 | WNW 9 | WNW 9 | NNW 10 | — | — | — | — | — | — |
11 | 9 | 9 | 44 | 68 | 8 | 15 | 7 | 99 | 101 | 99 | 96 | 61 | 62 | 125 | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 15 | W 11 | SW 16 | SW 14 | SW 14 | — | SW 13 | SW 13 | SW 13 | NW 12 | NW 14 | SW 12 | SW 12 | W 17 | W 9 | — | — | — | — | — | — |
9 | 2 | 10 | 8 | 8 | — | 7 | 7 | 7 | 69 | 158 | 6 | 5 | 23 | 38 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | — | — | — | NNW 4 | NNW 4 | NNW 5 | — | — | NW 7 | — | — | NNW 3 | NNW 5 | NNW 6 | NNW 6 | NNW 7 | — | NW 9 | NNW 7 |
61 | 68 | — | — | — | 13 | 15 | 32 | — | — | 63 | — | — | 3 | 44 | 101 | 134 | 277 | — | 461 | 323 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 52 | 218 | 0 | 0 | 52 | 52 | 92 | 118 | 32 | 0 | 118 | 0 | 0 | 218 | 76 | 221 | 218 | 117 | 118 | 351 |
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.











