The entire state of Baja California Sur relies on annual storms in August and September for water. This is our rainy and stormy season. We don’t get these storms from October through July. We don’t get any rain at all from mid October to June. Our water is stored in natural underground aquifers.
In 2014, our tropical storm was a hurricane. This was the first time that we had winds that knocked down power lines, and in Los Cabos at the bottom tip of the Baja Peninsula, the storm did major damage. Todos Santos 50 miles north, had high winds and lost power for a while, but other than some broken windows and ruined palapas no buildings were seriously damaged and there was no serious flooding.
All nights are cool to chilly in the desert. Bring a sweater or jacket with your beach clothes.
Wetsuits for Surfing
If I was a serious surfer in the Todos Santos area, it is unlikely that I would go out long enough to surf without a wetsuit in late February. As to swimming without a wetsuit, people swim all year long.
Sea of Cortez vs the Pacific
The Sea of Cortez is warmer than the Pacific. It is also more reliable. Balandra Bay outside La Paz is shallow and very warm all winter long. This applies to your possible beach stop on the Isla Espiritu boat tour as well. If you arrive in the daytime, you will be jumping in about 20 minutes from the airport on your way to Todos Santos.