Weather and Temperature - Plan for the Unexpected

We never thought we would experience it but then it happened - one morning in the Bahamas we looked at each other and noted that getting hypothermia was a definite possibility. Our feet were wet from wading and we were both shivering - meanwhile our guide had a puffy jacket and toque on! Those are items that we have plenty of but that we had left in Canada! Ever since then we haven't travelled to a warm destination without an extra sweater and long underwear, just in case. But then the opposite happened and we ended up steelhead fishing in the pacific northwest in temperatures over 30°C but had prepared for fishing in much cooler weather.
What can you do to prepare? Before you travel to a destination watch the weather in the weeks before you go to see what trends are taking place to help you pack appropriate clothing but then prepare for the opposite - just in case. It is better to have a full suitcase than to not be able to enjoy yourself because you aren’t prepared!