The following ranges can be used as practical reference points rather than guaranteed performance values:
| Rain and weather conditions | Surface drainage | Practical recovery |
|---|---|---|
| Light rain + sunshine + moderate wind | Often relatively fast | Potentially suitable for light use after inspection |
| Moderate rain + cloudy conditions | Moderate | Several additional hours may be required |
| Heavy or prolonged rainfall | Highly dependent on drainage design | May require substantially longer recovery |
| Cold + humid + low wind | Slow evaporation | Moisture can remain for many hours |
| Standing water after rain | Indicates a drainage issue may exist | Investigate before returning to intensive use |
For sports facilities, the decision to reopen should be based on the actual condition and performance requirements of the playing surface, not simply the number of hours since the rain stopped.
FIFA’s current football turf guidance emphasizes that quality basework, drainage and sub-base construction are fundamental parts of a successful synthetic turf installation. FIFA also evaluates the final installed field rather than treating the artificial grass product as an isolated component.
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