Essentials for hiking a glacier:
Ice Pick ✅
We actually got very lucky and had great weather when we hiked Sólheimajökull our guide said it was one of the warmer days he'd experienced on the glacier. The weather was in the low 50's (fahrenheit) and we were all sweating and shedding our multiple layers not long after we began.
While this weather was great for us, it's not so great for the glacier. Our guide informed us Sólheimajökull is continually retreating, and has retreated about 50 meters, 165 feet, since just last year 😯. You can simply drive to Sólheimajökull and hike around yourself if you have the proper equipment (crampons at the very least), otherwise you can book a tour like we did - and I'm very glad we did. You get alot more information and guidance with a tour. We booked with Icelandic Mountain Guides, and paid about $80 USD.