Surf Forecasts:
Ruby Bay surf forecast from 2 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 6PM (local time) - 3.5ft (1.0m), 8s period, N swell with 132 kJ wave energy.
Best Forecast Surf Conditions for Ruby Bay this week:
The most powerful waves expected at Ruby Bay in the next 16 days are 1.0m 8s and forecast to arrive on Saturday (Aug 08) at 6PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Saturday (Aug 08) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 6PM (Sat 8th Aug) | 3.5ft (1.0m) 8s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what’s cookin’ for the next couple of weeks.
Honestly, I gotta be straight with you – this stretch is looking pretty flat. The whole 16-day window is a write-off for any decent surf. We’re talking about a long, quiet run with hardly a bump to get excited about. The first real chance of a wave comes around Saturday the 8th, but even then, it’s small and weak.
The only spot in the frame is Ruby Bay, a sheltered little point that rarely breaks anyway. It’s a beginner-friendly setup, but it needs a lot of love from the ocean to work, and that love just isn’t here.
Things start to look a little less dead on the morning of Saturday the 8th. Swell bumps up to just 2ft from the north, and the wind goes glassy. That’s the cleanest it’ll be, but the combined energy is only in the weak range. It’s still a “poor surf” call, but if you’re absolutely desperate for a splash, that’s your best window. Later that afternoon, the swell nudges 3ft from the north, with a period of 8 seconds, but the onshore wind kills it. The energy climbs a bit, but it’s still weak push.
Sunday the 9th is glassy again in the morning, with 3ft north swell, but the energy is dropping. After that, it’s back to tiny, wind-affected junk for the rest of the run. There’s a weird little spike on the morning of the 15th, but it’s only 1ft.
So, the standout? There isn’t one. The best on offer is that Saturday the 8th morning glass-off session on a tiny, knee-high wave. If you’re a beginner, that’s your chance to get wet. For anyone else, save your energy. The water temp is about average for this time of year. This is just one of those blank runs that happens in a sheltered spot like this. Forecasts change, but for now, it’s a real quiet spell.
Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 15°C on Mon afternoon, min 2°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Fri night. Very mild (max 12°C on Sat morning, min 3°C on Wed night). Wind will be generally light. | ||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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) | N 21 | N 9 | N 10 | NW 17 | NW 16 | NE 4 | NW 14 | SSW 2 | NW 16 | N 13 | N 12 | N 12 | N 11 | N 11 | NW 4 | NNW 6 | N 6 | N 8 | N 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 9 | 1 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 3 | 3 | 3 | 3 | 2 | 14 | 123 | 35 | 112 | 102 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | cross-off | off | off | off | on | off | off | cross-on | off | off | glassy | off | glassy | on | glassy |
High Tide | 00:35AM4.10m | 1:02PM3.81m | 1:11AM4.02m | 1:39PM3.75m | 1:51AM3.89m | 2:18PM3.66m | 2:37AM3.72m | 3:01PM3.53m | 3:32AM3.55m | 3:56PM3.38m | 4:39AM3.42m | 5:21PM3.27m | |||||||
Low Tide | 6:22AM0.86m | 6:42PM0.87m | 7:00AM0.90m | 7:19PM1.00m | 7:40AM1.01m | 8:02PM1.17m | 8:27AM1.17m | 9:00PM1.36m | 9:24AM1.34m | 10:21PM1.49m | 10:36AM1.47m | 11:48PM1.47m | |||||||
 |  |  | | | | | | | | | | |  | |  | |  | | |
 | — | 7:33 | — | — | 7:31 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:26 | — | — |
 | — | — | 5:34 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 1 |
Temp °C | 8 | 14 | 15 | 8 | 10 | 11 | 4 | 8 | 8 | 4 | 8 | 9 | 5 | 9 | 9 | 8 | 12 | 12 | 8 |
Feels °C | 4 | 10 | 12 | 5 | 5 | 6 | 0 | 5 | 4 | 1 | 5 | 6 | 2 | 7 | 7 | 5 | 11 | 10 | 6 |
Swell 1 Height (m) Direction Period (s) | N 21 | NNW 4 | NNW 5 | NNW 4 | NNW 4 | NE 4 | NW 5 | — | — | N 13 | N 12 | N 12 | N 11 | N 8 | NW 4 | NNW 6 | N 6 | N 8 | N 8 |
| kJ | 9 | 2 | 3 | 3 | 2 | 1 | 1 | — | — | 3 | 3 | 3 | 3 | 1 | 4 | 50 | 35 | 112 | 102 |
Swell 2 Height (m) Direction Period (s) | — | NW 19 | NW 18 | NW 17 | ENE 5 | NW 16 | NW 14 | — | NW 13 | — | N 12 | N 12 | — | N 11 | NW 8 | NNW 10 | N 8 | N 20 | NW 19 |
| kJ | — | 14 | 13 | 12 | 3 | 10 | 8 | — | 7 | — | 3 | 3 | — | 2 | 2 | 19 | 34 | 7 | 14 |
Swell 3 Height (m) Direction Period (s) | NW 5 | N 9 | N 10 | NW 11 | NW 16 | NW 6 | — | — | NW 16 | N 13 | — | — | — | — | N 10 | — | — | — | — |
| kJ | 1 | 1 | 2 | 5 | 10 | 1 | — | — | 10 | 3 | — | — | — | — | 2 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SW 2 | WSW 3 | — | — | — | SW 3 | SSW 3 | SSW 2 | — | — | — | — | — | — | NW 4 | NNW 6 | — | — | — |
| kJ | 1 | 1 | — | — | — | 2 | 3 | 1 | — | — | — | — | — | — | 14 | 123 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 83 | 83 | 115 | 142 | 85 | 83 | 83 | 83 | 83 | 83 | 83 | 88 | 83 | 83 | 83 | 14 | 14 | 28 | 14 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||
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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 Ruby Bay 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 Ruby Bay Surf forecast
The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby Bay 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 (Ruby Bay) 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 Ruby Bay 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.
Are you planning a holiday in Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away
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