To truly enjoy the beaches, you should know what to bring and how to dress. The coastal weather is unpredictable at times. But, as anywhere, the seasons will give you a good indication of what you can look forward to.
If you decide to come from around the middle of June through September, you will more than likely enjoy dry, sunny days and cooler beautiful evenings, the moon reflecting off of the Pacific Ocean. July is usually the driest of those months, so that may be the best time for your trip if you're looking forward to pleasant weather. As I said, the coast is unpredictable, so don't count on Arizona-type weather all those months (or even Southern California).
If you visit from November through March, plan to meet up with some rain. The winter months on the coast can bring some pretty heavy downfall, but that is part of the charm of the Oregon Coast. The ocean waves put on a spectacular show for those who love a good storm. Nothing to be fearful of as long as you're not swimming in it! Simply something that will bring awe to it's viewers. For further information on temperatures along the coast, dash over to my Oregon Coast Weather page. Don't worry. I'll wait.
Back already? Cool `n´ groovy!
The best way to enjoy being there during the cooler months is to dress in layers. Heavy coats and umbrellas are good things to bring. Watch that bumbershoot though. When the winds get fierce, Mary Poppins would have nothing on you!
During the Summer months, shorts and a light jacket would do you just fine. If you plan to venture into the ocean, you can expect it to be cold. If you plan to stick to wading in the tide pools and only where the waves are lapping your feet or ankles, shorts or a swim suit will do you. For the more daring who chooses to go deeper, you may consider a wet suit. I would recommend that you actually make a list of what to bring so that you don't end up missing anything. Better safe than sorry.
If you're from some place fairly warm, I suggest you dress a bit warmer. Be ready for anything though. Just in case the sun decides to hang around for an extended stay, bring your designer sun glasses, beachwear, beach totes, coolers, swimwear, sandals and whatever else you can stuff into your car. The coastal weather is known to be schizophrenic. You may see rain in summer and warm, sunny days in December. If you're not a local, you may want to pack a combination of winter and summer supplies, just in case the weather turns.
Here is a quick list so that your time is a bang and not a bust:
What To Bring: The Summer Months
What To Bring: The Winter Months
What To Bring: All Year Round
Those are simply my suggestions and recommendations on how to prepare for your visits to the Oregon coast. As long as you exercise good judgment to prepare for coastal weather and your trip in general, you'll have a fantastic time!