At some point we all dislike our job regardless of what it is - we all wonder 'what if'.
Find the positives in what you do and stick with it - a lot of people would love ANY job and my mum always taught me to be thankful for a weekly salary coming through.
Can you re-locate to a coastal area so you can have a morning or afternoon surf with the kids ? That could be a starting point....can you work from home one day or two half days a week / flex time perhaps ?
The surf isn't good all the time and lots of workers surf more than those hanging around waiting for good conditions.....just tweak what you've got and be sure your wife / partner understands how important the surfing lifestyle is to your overall wellbeing.
For me, I grew up in the 'burbs and ended up working in the Inner West of Sydney.....I am in the same career now but work on the coast so if I can't get a dawn / dusk session in, the board is 'in car' for a lunch session when you just can't miss those special days with the flexibility to start late, extend a lunch hour or the like which has kept me happy in my work for many years....it's not what you do, it's about having employer's who allow flexibility to ensure happy staff.