Surfing and climate
How will climate change affect the waves we surf?
Climate change can alter the offshore waves arriving at a coast, while rising seas change the setting in which they break. The result is specific to each coastline. Research supports regional changes in wave height, period and direction, but cannot turn those changes into a reliable future surf score for Hossegor or Fistral.Morim et al. · wave climate
Follow three separate changes: incoming swell, the water level, and the shape of the coast.
Three things a wave projection can describe
| Measure | Published change | What it means |
|---|---|---|
| Mean significant wave height | 5–15% | Regional offshore wave climate |
| Mean wave period | 5–15% | Changes in the spacing of waves |
| Mean wave direction | 5–15° | A different angle of approach |
Will warmer oceans make the surf bigger everywhere?
No. The IPCC assessment describes different regional directions of change: increases in mean significant wave height in the Southern Ocean and tropical eastern Pacific, and decreases in the North Atlantic and Mediterranean under high emissions. An ocean-basin average is not a statement about every storm or season.IPCC SROCC (2019), Chapter 6
For a reader comparing surf destinations, the useful first step is to identify which ocean supplies the swell, then ask what the study actually measures. A statement about annual mean wave height should not be rewritten as a forecast for winter storm swell, the number of surfable days, or the biggest wave of a season.
Why can the same offshore change affect two breaks differently?
A regional projection stops short of the full local problem. Breaking waves also depend on water depth, seabed shape and coastline orientation. Changes in direction matter alongside changes in height. The IPCC coastal assessment treats waves and water levels as interacting parts of coastal risk.IPCC SROCC (2019), Chapter 6
Think of the offshore projection as an input to a further local study. To assess a named break, that study would need the bathymetry, shoreline response and relevant swell directions, with uncertainty carried through. PeakWave has not performed that modelling and does not label a beach a climate winner or loser from an offshore average alone.
Does sea-level rise mean a bigger tidal range?
A higher background sea level can make high-tide flooding more frequent. That is different from saying the astronomical tidal range increases everywhere. NOAA explains how rising seas can bring flooding during ordinary high tides, even without a major storm.NOAA · higher sea levels and tides
For a coastal trip, consider the whole session: where you enter, whether the access route remains usable and what local authorities say about the shoreline. These are practical checks, not a claim that a particular beach will lose access on a particular date. A climate chart does not supply the local timing or safe-entry decision.
Can a few seasons of surf scores reveal climate change?
A short conditions archive can help describe recent sessions, but it cannot isolate a long-term climate signal. Changing data coverage, forecast models and scoring methods can also alter the apparent pattern. For that reason, the observatory labels recent history separately from published climate projections and does not fit a warming trend through a handful of seasons.
If you keep your own session diary, record location, date, swell direction, period, wind and tide alongside your subjective rating. That makes it useful for learning the break. It still does not become a controlled climate record simply because it contains many entries: consistency of measurement and a suitable comparison period remain essential.
Keep climate context beside local knowledge
Use the science to understand pressures on a coastline, then use today's forecast, official warnings and local observations for a session. The practical implication is to build knowledge of the place and support evidence-based coastal planning. It is not to select a future surf destination from one percentage.
Sources, method and updates
The numeric comparison is a published multi-model offshore wave study. RCP8.5 is its high-emissions experiment, not a probability-ranked forecast. We preserve the source periods and do not mix wave height, period and direction into an invented surf-quality index. Coastal advice here is an editorial interpretation, not a local engineering assessment.
This is a PeakWave editorial synthesis of the sources below. We do not claim an independent scientific review or endorsement by their authors.
Read the source definitions and limitations
- Morim et al. · wave climate
Multi-model wave projections under RCP8.5, 2081–2100 versus 1979–2004. Regional mean height and period changes of 5–15%, direction changes of 5–15°. These are not changes in surf quality at individual breaks.
- IPCC SROCC (2019), Chapter 6
Assessment of regional wind-wave projections. The direction of mean change differs between ocean basins and does not describe individual surf breaks.
- NOAA · higher sea levels and tides
Higher background sea level increases high-tide flooding. It does not imply that every location's astronomical tidal range increases. Accessed October 2026.
Edition history and next editorial review
: First edition. Added offshore wave definitions, the distinction between sea level and tidal range, and the limits of applying basin-scale research to a named break.
Next planned editorial review: , to check newly published annual assessments and relevant research. This is an editorial target, not an automated update or a promise of new data on that date.
For corrections or source suggestions, contact PeakWave and include the passage and original evidence.