Surf Forecasts:
Costa Nova surf forecast from 5 Sep 2026:
- Best quality surf: Saturday 5 Sep, 10PM (local time) - 4.5ft (1.3m), 13s period, NW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 7AM (local time) - 5ft (1.6m), 13s period, WNW swell with 786 kJ wave energy.
- Next surfable swell (1★+): Saturday 5 Sep, 7AM (local time) - 3ft (0.9m), 9s period with WNW 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 (Sep 05) at 7AM. The primary swell is predicted to be 0.9m and 9s period with a secondary swell of 0.1m and 16s. Another secondary swell of 0.5m and 5s 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 1.6m 13s and forecast to arrive on Monday (Sep 07) at 7AM. 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+) | 7AM (Sat 5th Sep) | 3ft (0.9m) 9s |
| Best Surf | 10PM (Sat 5th Sep) | 4.5ft (1.3m) 13s |
| Most Powerful | 7AM (Mon 7th Sep) | 5ft (1.6m) 13s |
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’s on offer.
Alright, so the outlook for Costa Nova is a bit of a mixed bag. We’ve got a lot of days with marginal conditions and poor surf, but there are a couple of windows where things come together. The water temperature is pretty average for this time of year, nothing crazy to report there.
The first real chance to get wet looks like Saturday, the 7th of September. We’re looking at a 5ft swell from the WNW, with a period of 12 seconds. That’s a nice, solid groundswell with some decent energy (884). The wind is a light cross-shore from the NNW in the morning, which will keep things pretty clean. It’s a Monday morning, so the crowds shouldn’t be too bad, but it’s a beach and jetty setup, so that long period might make it a bit straight and sectiony. Still, this is the standout for the first week.
We see a bit of a lull after that, with a few days of poor surf and cross-onshore winds. The next little glimmer comes on Friday the 11th. The swell drops right down to 3ft from the NNW with a short, 7-second period, so not much power (139). But the wind goes glassy from the NNE. If you’re desperate for a slide on a longboard, this could be your window. The same goes for Saturday the 12th with a 3ft swell and glassy conditions in the morning.
Things get a bit more interesting again on Sunday the 13th. The swell jumps up to 7ft from the NNW, but the period is still a short 7 seconds, so it’s going to be a bit of a messy, wind-affected wave. The energy is solid (633), but with a fresh cross-breeze in the afternoon, this one is really for the crew with bigger boards or kites.
The real standout, the one that has me keen, is Saturday the 19th of September. We’ve got a moderate rain forecast, but the wind is a light cross-offshore from the NNE. The swell is a clean 3ft from the NW with a nice 12-second period, giving it good shape and energy (390). The forecast says “expect good surf conditions”, and that’s the kind of call I trust. This is a long-range look, so it’s not a lock, but with clean conditions and a solid groundswell, this is the best bet of the entire 16-day window. Get it in the diary.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Fri night, min 17°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Thu morning, min 16°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | |||||||||||||||
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) | WNW 9 | NW 14 | NW 12 | NW 11 | NW 11 | WNW 14 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | NW 8 | NW 11 | NW 10 | NW 12 | NNW 11 | NNW 11 | NNW 10 | NNW 7 | NNW 7 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 145 | 341 | 520 | 396 | 254 | 605 | 781 | 636 | 423 | 275 | 141 | 346 | 263 | 309 | 514 | 492 | 359 | 240 | 86 | 61 | 38 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | glassy | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | glassy | glassy | cross | glassy |
High Tide | 10:22AM2.53m | 11:29PM2.47m | 12:06PM2.61m | 00:56AM2.59m | 1:19PM2.80m | 1:57AM2.77m | 2:14PM3.02m | 2:45AM2.95m | 2:59PM3.21m | 3:26AM3.09m | 3:40PM3.34m | 4:03AM3.17m | 4:18PM3.40m | ||||||||
Low Tide | 4:24PM1.41m | 5:02AM1.49m | 6:01PM1.36m | 6:31AM1.41m | 7:20PM1.19m | 7:38AM1.23m | 8:17PM0.99m | 8:29AM1.04m | 9:01PM0.83m | 9:11AM0.88m | 9:41PM0.72m | 9:49AM0.76m | 10:16PM0.68m | ||||||||
 | |  | | | | | | |  | | | | | | | | | | | | |
 | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — |
 | — | 8:00 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 28 | 24 | 23 | 21 | 20 | 18 | 20 | 19 | 17 | 18 | 19 | 19 | 22 | 21 | 20 | 23 | 21 | 24 | 31 | 30 | 30 |
Feels °C | 25 | 22 | 23 | 21 | 18 | 16 | 16 | 16 | 15 | 15 | 16 | 19 | 20 | 18 | 18 | 20 | 17 | 23 | 28 | 26 | 29 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | NW 9 | NW 12 | NW 11 | NW 11 | WNW 14 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | — | NW 11 | NNW 13 | NW 12 | NNW 11 | NNW 11 | NNW 10 | NNW 7 | NNW 9 | NNW 8 |
| kJ | 145 | 162 | 520 | 396 | 254 | 605 | 781 | 636 | 423 | 275 | 141 | — | 263 | 290 | 514 | 492 | 359 | 240 | 86 | 33 | 14 |
Swell 2 Height (m) Direction Period (s) | NNW 6 | NW 14 | WNW 8 | WNW 9 | WNW 9 | NW 10 | NNW 9 | — | — | — | — | — | NW 14 | NNW 13 | WNW 8 | W 8 | W 7 | W 7 | NNW 9 | W 7 | NW 9 |
| kJ | 12 | 341 | 80 | 92 | 62 | 137 | 54 | — | — | — | — | — | 100 | 295 | 20 | 28 | 17 | 8 | 49 | 4 | 20 |
Swell 3 Height (m) Direction Period (s) | NW 16 | SW 12 | SW 12 | SW 12 | WNW 18 | W 9 | — | — | — | — | — | — | WNW 8 | — | — | W 12 | W 11 | W 10 | W 7 | W 9 | W 7 |
| kJ | 38 | 6 | 6 | 5 | 102 | 41 | — | — | — | — | — | — | 21 | — | — | 3 | 2 | 2 | 4 | 2 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 4 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NW 6 | NW 8 | NNW 4 | NW 10 | NNW 5 | — | NW 11 | — | — | NNW 7 | NNW 7 |
| kJ | — | — | — | — | 20 | 59 | 49 | 80 | 149 | 82 | 72 | 346 | 23 | 309 | 27 | — | 194 | — | — | 61 | 38 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 5 | 218 | 0 | 52 | 218 | 81 | 118 | 218 | 81 | 132 | 132 | 52 | 20 | 248 | 52 | 52 | 248 | 0 | 0 | 356 | 0 |
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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