A useful answer for the whole SUP session
GoodDayTo scores every hour in the one-, three- or five-hour paddleboarding duration you choose. A calm first hour cannot hide stronger wind, gusts or rain later in the same session. The first screen stays simple: a GO, WAIT or NOT TODAY verdict, the best complete practical window and one memorable line. The supporting facts explain what shaped that answer without pretending an air forecast describes the water.
This is deliberately different from a generic “nice weather” score. Stand-up paddling puts a standing person and a relatively light board into moving air, so wind and gusts matter earlier than they do for many land activities. The model searches the hourly forecast for the calmest continuous block that is long enough for your plan. It never silently offers one good hour for a five-hour request.
- Whole-session rain
- Wind speed
- Wind gusts
- Apparent temperature
- Daylight
- Fog and thunderstorms
🏄 Before the board touches water
- Check a dedicated local marine, lake or river forecast, including wind direction. A low speed can still be an offshore wind that carries a paddler away from land.
- Use a suitable buoyancy aid, the correct leash for the location and a waterproof means of calling for help. Match clothing to the water, not only the air.
- Confirm tides, current, waves, river flow, water temperature, access rules, local warnings and your return route. GoodDayTo does not measure any of them.
How the Paddleboarding score works
The ordinary comfort score uses forecast rain, rain probability, wind, gusts, apparent temperature, UV and daylight. That score is then limited by paddleboarding-specific rules across the complete selected session. The limits are conservative planning guardrails for an unspecified recreational outing. They are not universal coaching limits and they do not override a local instructor, lifeguard, harbour authority, event organiser or water-safety service.
Rain: at least 0.2 mm across the selected session, or a 60% probability in any selected hour, caps the answer at 45 and NOT TODAY. At least 0.1 mm or a 35% probability caps it at 70 and WAIT. Forecast rain is not the only wet-water hazard; the rule is useful because showers can reduce visibility, comfort and the margin for dealing with another problem.
Wind and gusts: sustained wind of 15 km/h or gusts of 26 km/h prevent GO. Sustained wind of 20 km/h or gusts of 32 km/h cap the answer at 45 and NOT TODAY. These thresholds create consistent decisions from the forecast data GoodDayTo has. Direction still matters enormously: the model cannot identify an offshore wind or know whether the return leg will be into a headwind.
Visibility and severe weather: fog receives the stronger on-water NOT TODAY cap. Thunderstorms, dangerous gusts, freezing precipitation and extreme temperature signals can also override an otherwise comfortable score. Any selected hour after dark receives the existing daylight cap. If thunder is heard, get off the water and find proper shelter; do not use the score as permission to continue.
Why Paddleboarding and Kayaking differ
Both tools check the whole trip and both keep real water conditions outside the weather verdict. Paddleboarding is more wind-sensitive in GoodDayTo because the standing paddler presents more area to the wind and can be separated from a light board. The SUP strong-wind guardrail therefore begins earlier than the kayaking one. That makes the pages genuinely different decision tools rather than two labels on the same score.
The comparison still has limits. A skilled paddler on sheltered water may use different personal limits, while a beginner, child, cold-water location, exposed coast or fast river may require much more conservative decisions. Board type, loading, group support, fitness, rescue cover and training remain outside the model.
Measured factors and honest limitations
GoodDayTo uses hourly precipitation, precipitation probability, air and apparent temperature, wind speed, gusts, UV, daylight and weather-code signals from the forecast. It does not measure the actual water. There is no live reading for water temperature, current speed, tide stage, wave height, swell, river level, dam releases, water quality, boat traffic, submerged hazards, algae, ice, beach flags, lifeguard cover or whether launching is allowed.
Local Fit can help you find mapped places connected with the activity, but a map result is not an inspected launch and does not confirm access, facilities or safety. Verify the exact site yourself. GoodDayTo also cannot judge whether your board, fin, paddle, buoyancy aid, leash, clothing, phone, experience or rescue plan suits the conditions.
A practical example
Suppose a three-hour session begins with 8 km/h wind and dry weather, but the final hour rises to 15 km/h with gusts of 26 km/h. The old average could make the overall period look friendly. The complete-session guardrail now caps that plan at WAIT because the return can occur in the strongest hour. If the final hour reaches 20 km/h or 32 km/h gusts, the result becomes NOT TODAY. If a later continuous three-hour block stays calm and dry, Better later can point to it.
For a five-hour half-day request, all five consecutive forecast hours must be available and assessed. Rain arriving in hour five still counts. If the forecast does not contain a complete continuous block, GoodDayTo does not manufacture missing hours or describe an incomplete outlook as safe.
Use one, three or five hours honestly
Choose one hour for a short session close to the launch, three hours for an ordinary outing including the return, or five hours only when it represents a genuine half-day plan. Include preparation and the realistic return time where possible. Longer selections are harder to qualify because more weather can change inside them, which is exactly why the duration control matters.
Safety sources behind the page
The RNLI paddleboarding guidance advises a buoyancy aid, waterproof phone, correct leash and avoiding offshore winds. Its beginner guidance also says to check weather and tides. The US National Weather Service boating guidance explains that all thunderstorms produce lightning. The US Coast Guard life-jacket guidance reinforces wearing an approved flotation device. These sources support the safety caveats; they do not supply universal numeric wind limits.
What the verdict means
GO means the complete selected air-weather window stays below the Paddleboarding caution limits and looks relatively calm and comfortable. WAIT means conditions are mixed or a later continuous window is better. NOT TODAY means the measured weather already makes this a poor choice. None of the three states certifies the water, equipment, route or paddler as safe.
Frequently asked questions
How does GoodDayTo check rain across a SUP session?
Every hour in the selected one-, three- or five-hour session is checked. At least 0.2 mm total precipitation or a 60% hourly probability caps the result at NOT TODAY; at least 0.1 mm or 35% caps it at WAIT.
How do wind and gusts affect the paddleboarding verdict?
Sustained wind of 15 km/h or gusts of 26 km/h prevent GO. Sustained wind of 20 km/h or gusts of 32 km/h cap the result at NOT TODAY. These are conservative planning guardrails for an unspecified recreational session, not universal safety limits.
Does GO mean the water is safe?
No. GO describes only the forecast variables GoodDayTo measures. It cannot assess water temperature, currents, tides, waves, river level, offshore wind direction, boat traffic, equipment, skill or local restrictions.
What happens when thunderstorms, fog or freezing precipitation are forecast?
Shared safety caps override comfortable weather. Thunderstorms, fog and freezing precipitation can force NOT TODAY even when another part of the session looks pleasant.
Can I use this result for coastal or river paddleboarding?
Only as a first air-weather screen. Coastal paddlers still need marine forecasts, tides, swell, waves and wind direction. River paddlers still need flow, level, releases, obstructions and local access information.
Which duration should I choose?
Choose one hour for a short sheltered session, three hours for an ordinary outing, or five hours for a genuine half-day plan. GoodDayTo checks every requested hour and never silently shortens the session.