Boat weather, since it comes up every summer. Wind cancels more days than rain does. Rain will not stop a dive boat. 20 knots does. Two questions before you pay. Who makes the call, and at what hour. Most skippers decide the night before, around eight. Some decide on the dock at seven, by which point you have already paid for a taxi. Second, ask what happens to the money. Refund or a date change. Keep a spare day. I lost Tuesday to wind out of Hurghada and got out on the Thursday instead. Thursday was not my flight home. It could have been.