Surf Forecasts:
Costa Nova surf forecast from 6 Sep 2026:
- Best quality surf: Thursday 10 Sep, 4AM (local time) - 6.5ft (2.0m), 8s period, NNW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 7AM (local time) - 6.5ft (2.0m), 13s period, WNW swell with 1,266 kJ wave energy.
- Next surfable swell (1★+): Thursday 10 Sep, 4AM (local time) - 6.5ft (2.0m), 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 2.0m and 8s period with a secondary swell of 0.8m and 12s. 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 2.0m 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+) | 4AM (Thu 10th Sep) | 6.5ft (2.0m) 8s |
| Best Surf | 4AM (Thu 10th Sep) | 6.5ft (2.0m) 8s |
| Most Powerful | 7AM (Mon 7th Sep) | 6.5ft (2.0m) 13s |
Table - best surf conditions forecast for Costa Nova over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
We’re looking at a pretty patchy 16-day stretch here at Costa Nova. The forecast is a bit of a mixed bag to be honest, with mostly average to small surf and a lot of onshore chop. Don’t expect fireworks, but there are a couple of clean windows to get excited about.
The first window of interest comes in the second week of the month. The surf is fairly small early on, but things start to build.
Sunday morning, the 13th is the standout. You’ve got a 5ft swell from the NNW with a short period, but it’s the wind that makes it: a light offshore breeze from the east, so the faces will be clean. The energy is moderate (544). This is the best bet for a decent session, but remember, with a short period, the waves might be a bit soft and crumbly. Crowds are possible, so get there early.
Then the next week, it gets cleaner for the mornings. On Wednesday morning, the 16th, we have glassy conditions and a 7ft NNW swell. That’s a solid size, getting into the territory where it’s a bit much for beginners. The energy is strong (615). It’ll be working.
The absolute top pick, though, is Thursday morning, the 17th. Glassy, clean, with a 7ft swell from the NW. The energy is solid (624) and the glassy conditions mean it’ll be beautiful. The short period (9 seconds) means it’s a bit more forgiving, but it’s a solid wave. This is the one you want to get out of bed for.
After that, things wind down and get smaller again into the final weekend, with mostly glassy mornings but small, weak swells.
The water temperature is about average for the time of year, nothing wild.
So, keep your eyes on Sunday the 13th for a fun, clean session, and circle Thursday the 17th for the best chance of some proper, clean, chest-high waves.
Rusty.
Short Range ForecastSome drizzle, heaviest during Tue afternoon. Warm (max 24°C on Sat night, min 17°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Fri morning, min 17°C on Tue night). Winds increasing (light winds from the NNE on Wed night, strong winds from the N by Fri afternoon). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | NW 11 | NW 11 | WNW 14 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 10 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 350 | 254 | 724 | 916 | 647 | 423 | 363 | 216 | 299 | 502 | 480 | 560 | 219 | 436 | 196 | 151 | 100 | 145 | 100 | 77 | 284 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | glassy | cross | glassy |
High Tide | 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 | 4:38AM3.21m | 4:53PM3.38m | ||||||||
Low Tide | 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 | 10:25AM0.71m | 10:50PM0.70m | |||||||
 | |  | |  | | |  |  | | | | | | | | | | | | | |
 | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — |
 | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — |
mm | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 19 | 21 | 20 | 18 | 19 | 20 | 18 | 18 | 19 | 18 | 18 | 17 | 21 | 25 | 23 | 24 | 28 | 27 | 29 |
Feels °C | 21 | 19 | 17 | 18 | 18 | 17 | 18 | 20 | 17 | 16 | 14 | 14 | 17 | 13 | 18 | 22 | 19 | 23 | 27 | 25 | 30 |
Swell 1 Height (m) Direction Period (s) | NW 11 | NW 11 | WNW 14 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | WNW 9 | NW 8 | NW 8 | NW 11 | NNW 12 | NNW 8 | W 8 | NNW 7 | NNW 7 | NNW 9 | NNW 6 | NNW 6 | WNW 9 | WNW 10 |
| kJ | 350 | 254 | 724 | 916 | 647 | 423 | 363 | 216 | 72 | 270 | 20 | 29 | 219 | 10 | 196 | 151 | 16 | 145 | 100 | 28 | 59 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WNW 18 | NW 10 | NNW 9 | — | NNW 8 | — | — | — | — | NW 14 | NNW 13 | NNW 11 | W 11 | NNW 10 | NNW 9 | W 7 | W 7 | WNW 10 | NW 11 | NW 14 |
| kJ | 88 | 103 | 137 | 54 | — | 7 | — | — | — | — | 7 | 16 | 214 | 2 | 75 | 16 | 4 | 4 | 9 | 31 | 102 |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 12 | WNW 9 | — | — | — | — | — | — | — | — | — | W 8 | W 11 | W 7 | W 7 | W 8 | W 11 | W 7 | NW 16 | — |
| kJ | 5 | 5 | 64 | — | — | — | — | — | — | — | — | — | 11 | 2 | 9 | 4 | 6 | 2 | 4 | 11 | — |
Wind waves Height (m) Direction Period (s) | — | NW 9 | NNW 4 | NNW 9 | NNW 4 | NNW 4 | — | — | NW 8 | NNW 8 | NNW 8 | NNW 8 | — | NNW 10 | — | — | NNW 6 | — | — | NNW 6 | NW 7 |
| kJ | — | 115 | 39 | 116 | 35 | 23 | — | — | 299 | 502 | 480 | 560 | — | 436 | — | — | 100 | — | — | 77 | 284 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 52 | 218 | 81 | 118 | 218 | 52 | 52 | 81 | 218 | 76 | 248 | 76 | 52 | 264 | 231 | 76 | 268 | 76 | 0 | 238 | 0 |
Best forecast wave conditions in Beira | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Costa Nova surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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